"Says who? Me? No. I don't know whether the statement is true or false and will not allow it to remain deleted using that as the reason. What if the statement is later proven true? The site would be in deep doo-doo for having taken it upon itself to say "No, that's a false statement." My leaving it intact doesn't mean I think it's true either. Because the bottom line is that I (and the site) do not determine what is true and what is false."
Change the topic to copyright law violation...who is to say whether something is violating copyright law. Just because someone says that he owns the rights to something doesn't mean he does...so what then?
and yes, chat sites can be held liable for copyright law violation....
as one can generally see from an excerpt on this page
Just because it is posted on the net doesn't mean it is free for the taking. No one would ever become a photojournalist if they didnt have some legal protection in reference to their photos.....