Begging whomever's pardon but the idea of a moritorium is, IMO, a resoundingly bad one.
Message boards, I believe, are intended to foster and be a vehicle for discussion. A moritorium runs directly contra to such intent.
It would be a different matter if posts were made on a matter completely unrelated to the subject matter of the message boards but that it not the case with 4e threads.
That 4e threads do not deal exclusively, or even at all, with hard "facts" is, IMO, irrelevant, as such is not in general a prerequisite for a thread. Speculation, "what iffing," opinions etc. seem as legitimate fodder for posts and threads as purely "factual" material.
The read counts, as well, suggest that 4e speculation, if it should be so named, if quite popular, at least among lurkers.
Those who have problems with 4e threads have a simple recourse - do not read them. This is easier now that they are clearly marked.
If, however, one feels compelled to read 4e threads, even though they do not like them, and moreover feels it necessary to ridicule those attempting to have a discussion, so as to derail or prevent such discussion, their posts can be, IMO, nothing but illegitimate for they arise out of personal preference that no discussion be had on the 4e topic. That is not their right, as I see it. No poster has a right to attempt to foreclose discussion by others through ridicule or "not again" posting, however veiled or blatant, on any topic, IMO.