Originally Posted by H_TeXMeX_H
Maybe you should not close the old threads but somehow not allow irrelevant necro posts.
I was thinking why not put a higher minimum character limit for older posts, that way necro posters are forced to make a larger post that may contain more information, or force them because of the inconvenience to abandon their attempt. You can put an explanation of this along with the warning that warns people when necro posting. Many necro posters add one irrelevant sentence to an ancient thread. I say force them to post a paragraph that way it may contain more relevant info ... or it may not.
Keep in mind that we do make it more difficult to reply to older threads: The Quick Reply is disabled and there is a large bold red notification on the new post page that says "Please note that this thread has not been replied to in over 6 months. Please ensure your reply is still relevant and timely."
That being said, we're certainly open to ideas to further reduce accidental or off-topic posts to older threads.