I would have a lot less problems with this if Stephen would close threads instead of deleting them, attaching a notice that it is closed and why.
And if he does delete threads, it would again bother me a lot less if these deletions were announced somewhere, along with the reasons for deleting. If nothing else, these announcements would serve as a public notice what kinds of threads Stephen tolerates and what he doesn't tolerate. If, like here, threads are just deleted without notice, and people have to ask where the thread went and are taken by surprise and start censorship discussions, I think something is going wrong.
I guess I'm with Ash in saying that this kind of deletion practice is losing Stephen a lot of respect in my eyes. IMHO at least he should be a bit more upfront about when he's deleting something and why. Of course, Stephen can see fit to do as he chooses, and then again I can see fit to be bothered by this and voice my opinion.