What concerns me the most is necro bumping on threads, these threads that died down from 3 or more months (or even years) are brought back to life because of this low ranked members randomly reading the title thread and then try to make a post in it. These threads will of course be put back in the first page of the section and a chain of members will follow and try to post some more spam in that old thread. I just wish there is a feature where threads (on certain sections) that didn't receive any new post for a given period of time will not be eligible to be bump in the first page anymore.