Well, he spouts whatever makes a youtube video gets hits. Without research or background. He is an entertainer after all. What he actually believes is probably unknown.
That's a fairer criticism, although I disagree. You could say "what he actually believes is unknown" about anyone, really. He makes his views quite well known, at least from what I've followed him.
Still, I think replying to someone's quoting Penn with the equivalent of "well he denies climate change, so why would we listen to him?" is pretty pointless for a debate, especially when what you say is wrong! We might as well throw out the ability to quote anyone, since basically everyone has some view that someone disagrees with.
Ok maybe he's saying what he thinks when he posts those rant videos on whatever subject. But in them he appears shallow and sophomoric. I think he's smarter than that, so I disbelieve they really reflect his opinions.
Ummm, no he doesn't? This was something he believed in the past but has since changed his mind about.