EDIT: People have generally swayed my opinion here. It's really only the "unanswered questions top voted" tab that seems to have an oversized string theory content. And partly it’s because of old questions going unanswered for a long time. Otherwise I'm exaggerating and nitpicking.
At my university, string theory courses are restricted to people who have taken about two years of courses on quantum field theory and the standard model. Only theory PhD students would ever take the class (a very small fraction of physicists). But there's so much string theory on the Physics Stack Exchange site - probably a lot more string theory than quantum field theory. Do other universities allow people to learn string theory without really learning QFT (so they can join this research field as quickly as possible)?