I wasn't there so I have to take his word for it, but... I really doubt that. Blinking, of course. People blink. But why, I cannot fathom, would everyone at a urinal be peering side to side and taking pictures of other people using the restroom? No one does that with the camera they carry with them everywhere. Why would Glass change that? What would it be about Glass that would suddenly make everyone want to take pictures of other men in the restroom?
Was this story just made up to be hyperbolic? I seriously can't figure out why Glass would cause such a huge cultural shift that would make people start photographing each other in the bathroom not only acceptable but common.