I voted to close the two useless questions asked today, but only because one was asking for a list, and the other was just silly (the condom question).
This got me thinking about the whole situation, and I agree with your conclusions - monitoring and squashing seems to be the way to go.
I don't think there should be any sort of censorship imposed on the types of films that are represented here, although there is certainly a distinction between the latest Kardashian sex tape and Busty Cops III, just as long as the question still falls within the guidelines of the site.
If you start to make adult films off-topic, then the line becomes blurred very quickly - where should we place The Brown Bunny, Last Tango in Paris, 9 1/2 Weeks, etc etc ?
So I say a film is a film is a film, and if the question fits the FAQ, it has a place on the site.