I believe there needs to be a time limit on how long forum threads stay up without being locked/deleted. (Obviously important ones would be an exception to this rule)
I don't know about anyone else, but I am tired of seeing the same threads which are months old, without any content, being on the front page every time I go to vote. Not only does this make it more work to complete the tasks of voting on content, it makes me not want to search for legitimate content to vote on.
I am not trying to be disrespectful to anyone, but I don't see how it's beneficial to the community or the system for threads that have been around for 8+ months to continue to hover around the top just because the poster/friend of poster keeps bumping it up, and then deleting their post.