I thought this was going to happen, and I think it's right to try and limit the scope of people filming everything. You need to pull out a phone and aim it to

I thought this was going to happen, and I think it's right to try and limit the scope of people filming everything. You need to pull out a phone and aim it to take pictures or videos, and in some jurisdictions it is compulsory for digital cameras to emit an audible noise when shooting. I guess in the end these head mounted cameras will have a small led so that you know when someone is filming you, and we'll be forbidden in places where privacy is expected or where recording is forbidden (cinemas, concerts, theaters…).