We could easily shut down the PC crowd simply by 'claiming' to be offended (as they do) by just about anything THEY say.
How are they going to get out of that one? ;)
One simple example: If they say "You're a racist".. You say "Oh, I'm terribly offended by that word. You can't use that word any more because it's offensive to some people.
Now I have to get back to my safe space and try and recover from the injury you just inflicted on me.
In other words, we can play them at their own game.
In fact I do actually get very offended by being called a racist.