Okay, so under normal circumstances the Prime Directive is a given, but the recent dramabomb leads me to believe that not everyone understands it. (Okay, so there's only, like, three members in this comm, but I'm guessing we have lurkers.)
Yes, the term "Prime Directive" is yoinked from Star Trek. In MST communities, however, it's the understanding that you DO NOT mention a fic's author in the MST, and you most definitely don't link the author to the MST picking apart their fic. The goal here is to entertain ourselves, not hurt other people.