This doesn't work with AOL CD's, but you can send junk mail back to its original owner. For example, if you receive a credit card application, stuff as much paper as you can in the envelope included in the application and drop it off in a mailbox or at your local post office. Most of these credit card companies pay the postage, so you don't need to buy a stamp. Plus, by stuffing as much paper in the envelope as you can, the credit card company will have to pay extra for postage because it exceeds the normal letter weight. It's a great way to stick it to The Man.