It's an absolute and indisputable fact that Google Glass does not have a recording light. It's not a matter of opinion.
And yet everyone I've run into with Google Glass I could tell if they were recording or not, bright light or not you can plainly see when they're recording. It's not a matter of opinion it's an absolute nad indisputable fact that you can in fact tell when someone with Google Glass is recording with just a casual glance. A secondary way of telling if someone with Google Glass is constantly recording is they'll never be wearing their glass. The batteries die quick in those things.