My Googling turned up several blog posts of people detailing their SMH (smacking my head) moments trying to get removed from the mailing list. Well, hat tip to Hobnob Blog who actually got an email from the Posties with a phone number to remove yourself. I just called and got a voice mail that assured me if I left my address with apartment number and zip code, I would be removed and only receive one more mailing.
I'll report back if it doesn't happen. In the mean time, if you'd like to opt-out of the Washington Post Shopping Guide, call 202-334-7730.
This has been a public service announcement by me.