Well most of the people on here object to what I say, and I'm sure Fowlers object to what you say, but that's not good enough reason to censor them.
Although Alex is the main Mod

I think he takes a pretty liberal approach. As Bart says, free speech rules, unpalatable as it may often seems.
When it comes down to it if people say outrageous things then it at least allows others to see their true colours and it often merely detracts from their more general case rather than supporting it.
So in a way censorship would be doing the censored a favour, rather than helping the readers more generally.