I know I personally generate a random number everyday that corresponds to one of the threads on this site and I delete it. I feel it's my duty to delete things and how unfair would it be if I didn't do it randomly?
OK... so maybe I don't do that.
I do however sometimes delete threads that pop up in any forum other than perhaps off-topic, where the only message seems to be "The threads in this forum suck." Somehow that doesn't strike me as being on-topic.

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside