biology nerd. derby girl. slowly accepting pottermore's decision to put me in slytherin. asoiaf (spoiler heavy up to ADWD, follow at your own risk). whedonverse. horror movies. pathfinder. world of warcraft. breaking bad. anything fantasy/scifi. mostly random.
Having never seen this show (past season 2), I’m gonna guess it’s because they’re all secretly jealous that Meg gets to bang Dean/Sam/Castiel(????)/some dude that they really want to bang and it’s ruining their banging fantasies so they take it out on her.