Good list Marko. I would also include drunks and petty criminals.

Most of my street photography is devoid of 2 legged critters. I figure that pointing a camera at someone,without their approval , is pretty rude.I don't want MY photo taken when I'm out and about and figure most folks feel the same way. If you do ask first then all you get is a badly posed "Year Book" type of shot.

Mike