There's this law in the US that was designed to prevent porn junk mail, but since porn is in the eyes of the beholder, you can claim you are sexually aroused by the Publishers Clearing House's missives and file a complaint.
Junk Busters: "The court didn't like the idea of the employees of the USPS deciding for the nation what is erotically arousing and what isn't. It avoided the question of erotica completely by ruling that you decide what's junk: "the addressee [has] complete and unfettered discretion in electing whether or not he desired to receive further material from a particular sender." To make their ruling absolutely clear, they said that you can stop a "dry goods" (clothing) catalog if you want."
-- via pleasing to remember