Interestingly enough, gravedigging a thread is neither explicitly nor implicitly in violation of the stated forum rules, which means we would be operating inside the "common law" area of Discovery, so to speak.
We would then have to question why a prohibition against gravedigging exists inside of Internet culture.
Well, since we just had a revision of rules and all, it does bear review. (Especially since the motivation seems to be less work/more efficiency.)
Previous precedent doesn't seem to be that good an argument for a subforum in which primarily nonsense is posted amongst the new posts anyway and +1 doesn't count.