Earlier this week, Ashton Kutcher made a mistake over Twitter. Having not heard about the Penn State scandal, he tweeted "How do you fire Joe Pa? #insult #noclass as a Hawkeye fan I find it in poor taste". And then he was railed by his 8 million followers for not being aware of WHY Joe Pa was fired. How he hadn't heard about the scandal as of Wednesday, well, that's another issue. But because of his gaffe, which he's repeatedly apologized for, Ashton has quit Twitter altogether.