Nonetheless, the right to freedom of speech is not the right not to be criticized. Treating all complaints like they are without merit does reduce the frequency of criticism, but it doesn't make any particular criticism wrong.

I wasn't talking about criticism, I was talking about offense in the sense fubarobfusco seems to be using the word:

And so they react by complaining about being censored, and political correctness, and "you're wrong, that word isn't offensive because so-and-so says it isn't!" as if offense were a one-place function — when all the offended party wanted was to explain that they feel unsafe and unhappy when someone tells rape jokes at a party, and would you please stop?

i.e., offense is a two place function, thus the person offended is by definition correct, so you by definition should not say the thing that offended them.