The behavior online is a real problem and it can be seen rather easily on blogging networks, and online forums.
Sometimes as a community leader of such a social network, it becomes necessary to throw someone off the love boat.
In a way this could be said to be a violation of free speech, but there is nothing you can do when tempers flare up and everyone gets their hair in a tizzy.
Sometimes the best strategy is to temporarily suspend an account or two.
And this allows people to realize that their temporary loss in privileges will become permanent if they do not wise up.
Then the social network leadership can bring everyone back down to Earth and start over.
They should also advise people to hold off on their attacks if their account is suspended, but they must also realize human nature; "someone who has been disrespected" or feels they have most often seeks revenge.
It is a real issue.
Even if an author, writer, blogger, or forum participant is at fault.
It's most likely best to go heavy handed on new accounts, than to delete substantial accounts from long-standing participants, authors, or bloggers because they will feel that they have lost more (time and effort).
Many blogging networks where a blogger had 100 plus posts, but was for some reason deleted, due to error or a mistake in the TOC (terms of conditions) of the network, would certainly be upset and would act like a virtual unibomber, going around the internet writing all sorts of mean-spirited attacks.
You might want to consider all this, as these are real issues and you are going to have to deal with them at some time or another if you choose to take an online community leadership role.
My best advice is to say "No" and not do it at all.
Either way, think on this.