All the damn time
I must be a crazy masochistic because I'm always watching videos of some journalist or intellectual or religious figure I disagree with, all in the spirit of "know thine enemy." Nationalists, religious fundamentalists, racists, etc; but they're low targets.
EDL vs Radical Islam is also one of my favourites to get me riled up. Wasn't it Harry Truman who said "If side A is winning, we help side B. If side B is winning, we help side A"?
But some of the best ones come from America where many talking heads and some radio hosts don't even try to be diplomatic ? or whatever madness crawls forth from Fox News. I can?t get enough.