Can no one see the penalty for the move was the flatspot on his tyre ?? It's pretty simple why drivers don't generally make that move, and that's because the damage casued to the tyre forced him to pit.
Yes it was a mistake, and no he's not an idiot as many people have said, it was a split second decision in the heat of the moment, and didn't deserve a drive through.
Yeah, I agree with that. Hamilton penalised himself, which is why I think the drive-through penalty was pretty harsh (although I can see why it was given).

Ayrton Senna: WDC 1988,
1989, 1990, 1991
McLaren: WCC 1974, 1984, 1985, 1988, 1989, 1990, 1991, 1998,
1999, 2007McLaren: WDC 1974, 1976, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1998, 1999, 2008