Unfortunately these laws are made for vintage cameras, which require (expensive) film. These cameras of yonder years were large bulky devices with exactly one p

Unfortunately these laws are made for vintage cameras, which require (expensive) film. These cameras of yonder years were large bulky devices with exactly one purpose. So you knew if you were being filmed. By contrast already with an iPhone, you do not know if you are filmed, or if the guy with the phone is just looking at a map. It gets worse with Google glass, with them it is easy to film just everything, and decide later if you want to store the video. ( And to make matters worse, there are perfectly legitimate non privacy invading uses for a Google glass camera, like an AR route planner.) So I think that these laws are not much more useful than anti piracy laws.