Where Are Smart Glasses Banned? The Useful Answer Is Rooms, Not Places

An overhead floor plan of a building divided into about a dozen cream rooms; three scattered rooms are filled solid amber while every other room and all the connecting space stays plain and open — AI-generated editorial illustration. Not a documentary image.

Explained by Maya Chen — LifePivo fictional editorial host

The question is asked as though there were a list, and there are lists. They name a hacker conference, a court system, an air force, a convention promoter, and then trail off into places somebody once heard about.

The lists are not wrong. They are answering with venues, and the venue turns out to be the least predictive thing about whether a pair of glasses is allowed. What predicts it is the room.

Five things called a ban, which are not the same thing

Put the current rules side by side and they do not belong in one column.

A rule enforced at the door, with a search. New York's court system barred the device from more than 1,240 courthouses, binding on staff and attorneys as well as visitors, and takes them at the entrance and holds them. A courthouse can do this because it already searches bags and posts officers.

A rule stated but not checked. DEF CON banned the device because there is no consistent way to tell whether a pair is recording, with no exception for prescription lenses. Nobody frisks thirty thousand attendees. An employment-law practice writing for retailers is blunt about what a rule of this shape rests on: the honour system, because the device cannot be remotely disabled and what it is running is invisible to everybody but the wearer.

A rule about rooms, not about the building. This is the one the lists mishandle, and it is below.

A law that has passed and is not yet in force. Illinois would add smart glasses to the state's distracted-driving prohibition, and unlike phones they would get no hands-free exemption at all. The General Assembly approved it in June and it went to the governor's desk — reported at the time as heading for signature, which we could not confirm has happened. A bill on a desk belongs on a list of proposals, not on a list of bans.

And the places people assume, which have no rule. Most of the venues in a reader's head — the gym, the cinema, the shop — have published nothing at all.

The rule that covers the most people bans nothing

The largest venue operator to write a policy did not ban the glasses. Royal Caribbean lets you bring them aboard and use them, and then names where you may not.

The casino. Spa service areas. Restrooms. Locker rooms. Medical facilities. Security screening. Youth facilities. Back-of-house tours. Crew areas. And then a clause that does more work than all of them: anywhere there is a reasonable expectation of guest or crew privacy. The line was reported across the cruise press when it appeared — by Cruise Critic, CruiseMapper, Cruise Hive and Royal Caribbean Blog — and the glasses may be confiscated if the rule is broken.

A ship is a useful case precisely because it is a whole small town under one policy: bars, shops, a theatre, a clinic, a crèche, thousands of cabins. Given the chance to write one rule for all of it, the operator did not write "no". It wrote a list of rooms.

It is worth noticing what the operator gave up by writing it that way. A blanket no is trivially easy to communicate and trivially easy to enforce at one gangway: you either brought them or you did not. A room-by-room rule has to be published, understood, remembered halfway through a holiday, and applied by a wearer standing at the door of a spa. The line took the harder rule anyway, which is a reasonable signal that the blanket version was considered and judged wrong for a ship — a place people live in for a week, and where a device that reads menus and translates signs is genuinely useful in the other nine-tenths of it.

The phrase they borrowed is not decoration

Reasonable expectation of privacy reads like the sort of thing a policy writer adds to cover the gaps. It is also, almost word for word, the hinge of the law.

The federal wiretap act protects an "oral communication" only where the speaker was exhibiting an expectation that it is not subject to interception "under circumstances justifying such expectation". The protection is not attached to a place. It is attached to whether the expectation was reasonable there.

So a cruise line and a federal statute have independently arrived at the same instrument, for the same reason: no list of rooms can be finished, and a principle can cover the room nobody thought of. Which means a reader who understands the principle can answer the question for a venue that has never published anything.

What the rooms have in common

Read the enumerated list again and it is not a list of private places. A ship's restroom is private; its casino is not. Its medical centre is private; its youth club is full of other people's children.

What the rooms share is that someone in them is undressed, gambling, a minor, receiving care, or being processed — states in which being recorded is not merely unwelcome but consequential, and in which the person cannot easily leave. Security screening is on the list for the same reason a courthouse is: it is where you must stand still and be looked at.

That is a far better predictor than any venue list. It is why a swimming pool changing room will end up covered and the pool will not; why a hospital ward will and its car park will not; why the four institutions everyone cites are a courthouse, a security conference, an air force and a convention hall — buildings that are almost entirely made of rooms like that.

And it explains something the venue lists make look arbitrary. Four institutions banning the device inside seven months reads as a wave of alarm. Sorted by room it reads as four organisations that happen to be composed of exactly the spaces where the answer was always going to be no.

There is a second thing the room test explains, which the venue lists make look like inconsistency. People notice that the glasses are barred from a courthouse but not from the street outside it, and read that as a rule not yet finished — as though the street were simply next. It is not next. The street is not a room where anyone is undressed, gambling, under-age or being processed, and no published rule so far has reached for one. The pattern is not an incomplete ban on the device. It is a complete ban on a specific situation, applied wherever that situation is housed.

What this does not solve

None of it survives contact with the door.

Every rule above still requires somebody to notice the glasses, and every published method of spotting a recording carries its own admission that it fails. New York's answer works because a courthouse can search you. A cruise line's works because a ship is a closed community with staff in every room and a card with your name on it. A convention's does not, which is why DEF CON's is a request with a rule's grammar.

There is also a live commercial interest in the enforcement gap being real, and it is worth naming. The most complete running list of venue bans on the open web is published by a company selling radio detection hardware. That does not make its list wrong — it is a useful list — but a page whose business improves when rules cannot be enforced is not a neutral narrator of whether they can be.

The short version

If somebody asks where smart glasses are banned, the list is: New York's courthouses, DEF CON, the US Air Force, a UK convention promoter, a growing set of individual courts, specific rooms on cruise ships, and — if the governor signs — behind the wheel in Illinois.

That list will be out of date, and the principle underneath it will not. Ask what the room is for. If the people in it are undressed, gambling, under-age, being treated, or being searched, the answer is no, whether or not anyone has written it down yet — and whether or not anyone at the door can tell.