As a person who is intimately familiar with Yahoo systems and practices, as working with Yahoo as a vendor is part of my job, I can assure you that IF such a thing were possible, it is not something that Yahoo does. For your supposition to be true, Yahoo would need to be running a real-time free-text parsing scheme AND people would need to have their name and address in the email OR they would have to have their name and address stored in their Yahoo general profile AND Freecycle.org, which is an autonomous 501(c)(3) organization run by a jackass fool who alienated people like me who now don't even assocate with the organzation, but continue to operate what WAS a freecycle group but IS NOT affiliated or endorced by Freecycle.org

But I digress.

Your assertion that Yahoo is in some way associated with your direct mail problems is unfounded.

The cross-contamination of consumer marketing and public record data data is both well-known and impossible to fix. For example, search for your own name on www.zabasearch.com - which is a company that has nothing at all in common with Yahoo. You'll find yourself facing a wall of partially correct data.

Pop-up ads were used first in 1995, long before Yahoo was famous or important. Wired.com was a heavy user of them, as was the New York Times.

Again, with a little research, you'll see that just because YOUR experience has been that Freecycle organizations YOU are aware of happen to use the Yahoo Groups system, it does not mean that Freecycle=Yahoo. It's like saying "I hate that TV show and Toshiba is to blame, because they make the TV I'm using to watch it" Toshiba just delivers the show, it does not create it or care what you watch. All Yahoo cares about is that you see and click on their ads on the sites. That's it.