A small consequence though - if you kill him, you lose 1000 lawful. So, drain with care. If you drain, and then someone else kills him, you lose lawful too. So, the best thing to do is drain from him, then restart. This will prevent you from losing lawful on Bob's inevitable death. Also, draining from Bob doesn't lock up Restart - that is, you won't get the "can't restart while in combat" message if you want to restart immediately after hitting Bob.

I suspect Bob is going to be very popular soon as killing him once will give the chaotic dog people 10x the amount of chaotic as killing other NPCs...