I would be inclined to say they are using this tactic to make the information travel as opposed to suppressing it. If they allowed the thread we would have all read it and been like... oh shit, and then moved on.
since it's deleted it is now a big fucking deal all the sudden. your not allowed to talk about it so everyone starts attempting to spread it through other channels. The idea seems to be working because I've seen it in a few people sigs.
lol... don't be fooled