I work in a school. These devices will inevitably be banned in such places. It's already a bit risky to take photos of children - it has been suggested (albeit by an especially neurotic, paedophile-obsessed parent) that one of my colleagues is a paedophile for taking photos of school events. For a member of staff to wear these glasses at school would be risky, to take them into a sensitive area such as a boarding house or changing room, a career-ending move.

I can foresee that other places, like the bar in OA and hospitals, medical waiting rooms, lawyers' offices, etc, have an implicit assumption of privacy which would be infringed by these devices. Many conversations and meetings have similar unspoken requirements - if you might be recording or photographing me, I'm not talking to you. Wearing these to a blind date or job interview could be an immediate deal-breaker for many people. "You're recording this? How dare you!"

It doesn't seem unreasonable for people to ban these devices. The assumption of many potential users that I am happy to be photographed, recorded, uploaded and discussed is what needs to be challenged.