When I was an undergraduate at the University of Texas in the late 80s there was the huge fad of philosophers making fun of professors in other departments who had appropriated philosophical thinking for their own projects.
Honestly, it's pretty easy work for people who spend their lives just studying philosophy to beat up on our brothers and sisters in humanities departments when they enter into conversation with a philosopher. The trick is to bracket the dialectical context of the appropriation as well as treat the norms relevant for engaging in those debates as if they are the same as writing good philosophy. With literarature department deconstructionism, this meant completely ignoring the context of New Criticism and the contribution that the appropriation of Derrida and De Man's writings made with respect to this background.
As a result of the kind of methodological stupidity the revolution very quickly began eating its own,* culminating perhaps in the 1992 petition against awarding Jacques Derrida an honorary Cambridge doctorate. By this point it was clear that American philosophy had completely squandered a very real chance of retaining a role as queen of the humanities. If during theory's heyday, a critical mass of us had actually taken the time (a couple of years hard work in each case) to actually immerse ourselves in the relevant history and canonical texts of other departments doing "theory," philosophy would today widely be viewed as a helpful discipline, as opposed to this weird thing where we spin our own wheels.**
One of the most depressing things to me as a student of continental philosophy is to see how the worst aspects of the the analytic/continental rift are now being replicated within continental philosophy.
