And what's to stop these perverts doing the same thing with hidden cameras, phones, CCTV etc?
If someone approached you with a large video camera on their shoulder and started asking you questions, you'd automatically assume you were being recorded right?
If someone approached you with a phone camera raised up so that the lens is pointing at you, you'd also automatically assume you were being recorded?
If you didn't want to be recorded in these situations, you'd refuse to talk to this person until they turned the camera off, right?
So if someone approaches you wearing a known brand/model of camera equipped glasses, why would you assume that they are not recording?
If you don't want to be recorded, why wouldn't you demand that the wearer remove the glasses and put them away?
There is nothing covert about a pair of branded and well publicized glasses stuck on the front of someone's face. You can see what they are, you know what they are capable of. Someone with a concealed camera is much more dangerous, and tiny concealed cameras have existed for a long time.