With latest additions to the copyright lawsuit against google/youtube:
http://news.zdnet.com/2100-9595_22-6...ml?tag=nl.e550
And the use of comments on blogs, message boards, torrents on torrent sites, entries on info sites such as wiki sites.... and so on....
The law is having trouble keeping up, as far as I can tell. It's not easy to track down individual users who say something they shouldn't, share something they shouldn't or.. just do something they shouldn't.
How much responsibility do you feel the site owner should have?
None? They didn't do or say the things.
Some? They do provide the forum to allow such things.
All? It's their property on which the offensive material is on.