About once a week (and I focus on a rather small part of Ubuntuforums) I see an old thread revived, followed a couple of hours later by a post from $random_moderator warning about necro-bumping threads and closing the thread.

So, idle question: given that this forum is very likely maintained by the technical elite of forum admins, how come noone has ever written something to automatically close all threads without activity in the last X months?