[Matt:]

As for the vast majority of posts, there is nothing individually identifying to the person posting. Not sure what the big deal is anyway. All pictures etc.. can be deleted by yourself.

All posts are anonymous unless you post identifying information yourself.

Also if too many requirements are placed on sites like this, there's a chance they will either have to shut down or become paid sites, so they can afford a legal team! As far as I know, none of the admin or staff get paid for what they do.