I was just viewing another website, http://forums.extremeoverclocking.com/
, and they are running vBulletin Version 3 and I just noticed that all the threads prior to August 05 all seem to be locked in a particular forum of theirs. The threads all seem to be valid threads yet they are all locked.
I am thinking this could help with newer members/trolls from upping dead threads if threads that are older than X months are locked. Heck, I remember two or so months ago that a thread I posted on with my previous account was brought back from the dead.
I understand that this may become a problem with stickied threads that are open ended, but if one of those threads have not been posted in for X amount of months... It sounds like an open and closed book. A moderator could unlock said threads of course.
Just a suggestion.