I understand that I don't have any expectation to privacy when walking around in public. Of course you have. Naturally anybody can see you, but it does not fol

I understand that I don't have any expectation to privacy when walking around in public. Of course you have. Naturally anybody can see you, but it does not follow that anybody, especially a state representative can follow you and record your whereabouts. Well, maybe in US you can, I do not know US law this much, but in many EU countries this constitutes as surveillance and requires a warrant.