It has always amazed and annoyed me how the Scoobies automatically assumed that Buffy had gone to some hell dimension. Sure, she jumped in the portal to one, but as we all could see, she came out at the other end (unlike some others who were sucked into hell dimensions, like, say, Angel). She had done so incredibly many good things, that, although it's just my opinion, there was no real reason to believe she was in hell. Their decision to bring her back was, or at least, seems, so terribly selfish. Of course they were grieving, but they didn't even consider the option that she was in some happy place. It was just, WANT - HAVE (as in, WE want Buffy back, so we have to bring her back, even if we'd have to kill half a zoo for it).
It annoys the hell (haha) out of me that the people I've grown to love could do something so incredibly selfish and, one might say, stupid.