Offensive facebook groups?

[john]

So there is this new thing going around called 'Spotted: (then a place is put in)' Which basically has people sending in pictures of other people they see out and about, say a night club or in the town centre. There are many at the moment however some in particular seem very hostile. They're adding pictures that other people have sent of people doing silly things and then everyone criticises them or gets quite offensive. Quite a lot of nudity as well. One group in particular had a complaint from a person and then posted this complaint on the facebook group page, they're reply to the complaint was also very offensive and full of harsh language.
Surely what they are doing is against facebook policies? Surely some of it is illegal?

[Arged]

You mention nudity. What is wrong with nudity?

[MaganG]

Don't worry about other ppls buisness

[Francesca]

Yea you can't just go Around taking pics of strangers without them knowing and then post it online and badger and humiliate the picture/ person! That's awful