If you just had one of those days and wanted to get even with the world, or at least the USPS and someone who sends you junk mail, you can ...

First, find one of these business reply envelopes or post cards that comes with junk mail and has the return postage guarenteed. Next, tape it to a brick that is neatly wrapped in brown wrapping paper. Then deposit it in your nearest mail box. As far as I know, the USPS has to deliver and the junk mail sender has to pay for it.

This is something that going around college campuses in the anti-establishment 1970's.