I disagree. I'm not trying to trick people. I use it to illustrate the stupidity of opposing positions. It's rhetorical. It's not designed to get people who think I'm serious cheering me on, at least, not forever.
Similar to parody, it's only funny if people are brought in on the joke. If Sasha Baron Cohen wasn't a well known comedian making a comedy movie, Borat wouldn't be funny and would fall flat on making any sort of point. It would just be like a documentary made by a pitiful idiot.