George Carlin. People are always posting a clip of his to make a point on a subject like he is this philosopher king. I even saw somebody post one of his clips to make some ridiculous point about medicine/sanitation and people were going along with it.
I always have a hard time liking people who aren't qualified to do as much lecturing as they do. The people who talk about how our government/economy/society should be without being qualified to do so are the worst for me. Discussion is great, but fire and brimstone arguing when no one knows what they're talking about is the worst.