We all receive junk mail. Imagine for a moment what would happen if everyone responded. I don't mean that you should take offers for credit cards, promotional trips, etc. seriously. Just send back the materials that were sent to you in whatever postage pre-paid envelope was provided in the mailing. If you are inclined, you can also write a big "NO" or something more colorful on these materials. This costs nothing and takes only a few seconds. If many people start returning promotional materials, the cost to marketers of dealing with this flood of useless paperwork will be almost as high as the social cost imposed by marketers on consumers everywhere. You don't need to tape on a brick or anything like that. It also feels pretty good.