I am against all censorship, regardless of content or reasoning.
As a free-willed human being, you have the right to walk away, and the right to ignore.
You also have the right to criticize.
But you don't have the right to force someone else to not express themselves.
The second you do, you give up that right yourself.
To put it simply, in my mind:
A murderer has no right to life.
An invader has no right to privacy.
A critic had no right to a lack of criticism,
A censor had no right to free speech.
It seems like a good philosophy. If you don't want to be treated a certain way, don't do it to others. (Kind of like the inverse of the Golden Rule.) As such, I will always stand against the people trying to silence others, no matter how much I agree on principle with them, and disagree with the one I stand beside.
"I disapprove of what you say, but I will defend to the death your right to say it." - Evelyn Beatrice Hall, summarizing her friend, Voltaire.