The BMFH
Antti-Juhani's post got me thinking. I cannot agree more with him; getting a confirmation mail from someone you don't even know is like getting the neighbour's garbage dumped in your garden.
There's an easy BOFH-style solution, though. Instead of discarding those mails along with the rest of the spam, reply to it. After all, such mails are based on the idea that you'll say "oh, yes, thank you for the spam, I'll just discard it 'cause you're too lazy"; if you don't do that, it won't work no more.
So, there I have it. I never confirm those mails if I sent it in the first place anyway; but when people start mailing me such junk when I didn't contact them, I might just reply, and confirm the mail, just so the system stops working. All hail the Bastard Mailer From Hell!