It's lame when people try to equate censorship and free speech issues to not being allowed to insult people online. They are completely disparate concepts.
I don't know how an individual site can ever censor someone or violate their free speech because people are free to create their own site to say whatever they want. Having the right to say something doesn't mean that someone else has the responsibility to provide a platform for them of course.
Only governments can really censor people by compelling ISPs etc... to do it. The irony is that the free speech guarantee is meant to cover political expression which would normally be directed at the government. Does it happen anywhere else but in countries like China or the middle east?
When people try to claim it applies where it doesn't it usually means one thing and one thing only: they have a weak or zero argument and know it so they make an appeal to claim some sort of persecution instead.
It's a shame that it distracts from the real issues being discussed - obviously the intention of the trolling behavior and whining.