This kind of rule is reminiscent of some really screwed-up fora that i've known, where the local mad dictator deletes members at the drop of a pin for daring to breathe a word of disagreement. Naturally, the deleted people are not allowed to be mentioned. And, naturally there's no way to tell that they didn't just leave of their own accord
I would not for a moment suggest that this forum is, or ever will be like that. I'm saying that you really don't want a set of rules that makes you look like that kind of set-up, nor that invite future forum staff to act in that way, should they take the rules too literally.
This rule needs careful re-wording, if it's needed at all, so that you CAN delete such threads ...but making it clear that normally you wouldn't
jay