A couple thoughts: 1) I think it's a little weird everyone is treating this as a done deal. I'm not saying it's definitely a stunt, but he backs out of plans and partnerships constantly, even halfway through. 2) To the extent he's got a real motivation beyond receiving attention, I think you have to take personal vendettas seriously. He's clearly let his preoccupation with Tesla's short-sellers affect his decisions (though it's hard to argue he's done anything "wrong" given that 270 number, Jesus). It doesn't seem outrageous to me that being able to roll out his fantasy ban list is worth a few bil in the calculus. 3) In some sense he's a perfect person for the job because his management style closely matches the vein of power users' complaints: rabid focus on bullshit minutiae. It's hard to imagine a CEO who would be more receptive to taking ideas like "don't let eggs reply to me" seriously.