[mousetree]

My favourite, taking a photo of a nice outdoor scene with random people in the background, someone will always run up to you shouting "Datenschutz!"

[usrusr]

Harmless, in my experience. The gloves come off when there's not a person in the picture but a car.

[sib]

Say more?

[OoooooooO]

Doesn't matter because Panoramafreiheit.