British Airways was reported across the aviation press on 16 and 17 October as having banned Meta Ray-Ban AI glasses on board. We went to the General Conditions of Carriage. They do not mention smart glasses anywhere.
What the conditions do say: Section 7a10, which covers refusal of carriage, includes filming, live streaming or taking photographs of any BA crew or other colleagues without their consent. Section 11a lists recording employees without permission among unacceptable onboard behaviours. The rule is device-neutral. It applies identically to a phone, a camera or a pair of glasses, and wearing Meta glasses on a BA flight is not prohibited.
The consequences are real even if the framing was wrong. BA can stop the conduct in flight and, after landing, remove the passenger and refuse carriage on remaining sectors - including a return flight already booked and paid for. It may also report an incident to authorities where a criminal offence may have occurred, though breaching an airline filming policy is not itself a crime. The practical risk for smart-glasses wearers is genuine, because recording with glasses is hard for crew to detect and easy to do without announcing it. That is a real enforcement problem. It is not a ban.