Let's take a look at this. First, we're already "labeled" by the left regardless of whether or not we're all polite and nice and sweet or angry and bitter in our posts. It doesn't matter. Second, I think anything short of outright threats of violence or libel is fair game. At this point it doesn't matter because the lefties have made up their mind.
Finally, I'm much more polite here than I'd be in a room full of liberal idiots...especially John Morse. I'd say far worse about him to his face, or in a crowded room, than I'd ever consider posting here.