"I don't think it was necessarily the glasses which were the problem."
No, it was the camera. Just, everybody now has camera in the phone, and will still record and upload whatever happens around... and people looks not to be so worried anytime someone holds a phone in fron of him or her. Maybe it's just because snapping a selfie or making a video call... or maybe it's because they're recording the next viral video and the protagonist is you...