Please use the "Report This" feature when you feel it is warranted. It has been almost two months since activity increased to where I'm unable to read every post in every thread.

I've no idea what's available for vBulletin in that regard, nor am I fully confident that such a system would work well. At Slashdot, for instance, the post ranking system simply traded one set of problems for another, and Engadget appears to be heading the same way.