Roger, I think that if you acted as you suggested in answering those 2 questions below (email/pornography) you would be liable to prosecution as the owner of the site. Certainly in the case of allowing someone's email address to remain there in a post. There are lawyers out there that would tie you in knots over that.

I did say that I would fail..........

But do we not all first have to accept the limitations of a forum that is open to the public and accept that we have no control over the postings of others?