Bobby hasn't been "alive" but just being present in some way undermines the "finality" of death

Hm, I don't mind the way they brought Bobby back so far. I mean, in the S9 opener it wasn't even really Bobby, and in Taxi Driver I was more annoyed about the poor characterisation for Bobby than about his spirit making an appearance. The thing is, death in the Supernatural universe is never truly 'final' - in the sense that people cease to exist entirely - since there is an afterlife. But as long as characters stay dead and are not resurrected, I am good. :)