It actually might be a clever way of giving the custom PC have some business in the game.
The guy during the "AMA" was right too, I think a vast majority of people who play games never choose the 'evil' path, despite it usually being 50% of the 'choice' in a game, so more than some lame answer about the temptation of power, having a character with a schizophrenic need to do murder is a bit more of an actionable route into roleplaying evil. Plus we know there's a evil top hat wearing goblin involved...or something.
