A friend sent me this question a couple days ago:
How long should you wait before you stop replying to comments?
He said he had un-replied-to comments from last November he still hadn’t gotten around to.
My thoughts are: if it’s gonna bother you that much that you don’t reply to a comment, then just reply, already! I’m not saying “phone it in,” but if you’re that pressed for time, a simple “Thanks for your comment” or “Thanks for sharing your thoughts” will let commenters know their efforts are acknowledged and appreciated.
But this prompted another, related question: do you disable comments after a certain period of time?
I think this depends on how much traffic and comments a post received on average (and specifically, what percentage is comment/trackback spam).
Where do you draw the line?