In regards to all the comments on Laura and Kelly's bad attitude: Though I completely agree with the many of you who stated that they were being mean girls, I found the focus only on the women to be a bit disconcerting... my question is:
WHY is Dave getting a free ride? He didn't even show up for Shambo's entrance, and is as much a mean girl as the other two. Maybe more. He seems to harbour more resentment with Shambo than either of the others, though Laura is more passive aggressive about it, wheras Dave is just a big mouth.
I found his speech about Shambo "keeping to herself" and behaving "normally" as "refreshing" so condescending, I would have slapped him right there given the chance. HE is awful.