I'm having trouble coming up with too much sympathy here, except being detained for 5 hours is overkill.
Agree or not, we all know that it's illegal to record movies in the theater. We can all bring out cell phones and digital cameras with us because they make so much light when they're in use that it's apparent if someone is using one to record a film, not so with google glass. And since it's such a new technology, there are going to be a ton of people who don't understand it.
There are many other places where filming is forbidden, and some places where even bringing a camera capable device is forbidden too, so the guy should have some common sense and bring a pair of prescription glasses for yhose eventualities.
Anyone with enough money to get a glass surely has enough funds for a pair of ordinary prescription glasses.