Clearly state what is allowed and what is not. Do not pick sides and change rules on a case by case basis.
Do what you say you are going to do. That's how businesses used to earn trust. Now integrity in business is a thing of the past.
I'd rather have a bunch of crazy people expressing themselves on the web than being selectively removed due to a couple's persons opinions on what is right especially when it is not written in stone and enforced sitewide on all accounts.