I think that if we do nothing they will probably fade away on their own. I read the first posts, and had a good laugh, and haven't bothered reading any of the newer posts because the joke is getting old.
Rather than moderating them out of existence, perhaps a good first step would be to move them into the "Off-topic" forum, with a note to the poster re the reasons for the move, and if they still crop up with frequency rather than moderating them out of existance, one of us can post a funny note about "not needing any more wenches" or something to that effect.
For that matter, we could write up a "don't need any more wenches" post now. Hmm, a good title would be "what's the difference between a winch, a wince, a wrench, and a wench?'' or something like that...
Same result, but no hurt feelings. If they keep coming after that, then moderate away!