Did anybody think that it has nothing to do with the fact that you are shooting in a public space, but more with the fact that you are shooting the people themselves?
I live in Belgium, and what I usually do, is walk up to the people and ask if they mind if i shoot some test video etc... they usually don't mind. But if i start filming paparazzi style without their consent... I dunno, I guess that isn't really cool. I mean, if I go shopping or take a strol in the park, I also would mind if someone was constantly filming me without me knowing... Kinda creepy if I think about it.
Filming in a public space= fine
Filming people without them knowing in a public space= stalkerism = not cool