My wife made a similar suggestion a while ago

, about putting heavy stuff inside the envelops and sending it back, but I don't think that it can accomplish much (except to vent some frustration). It is funny though.
About the idea of using some of the offers, I actually did it in the past, but now that I have paid off all my debt, I don't see a need to use them anymore.
My question was originaly inspired by trying to find an equivalent to the "do not call list" for junk mail. I appreciate your answers, and I going to try some of the resources you mention. I will post any outcomes of this experiment.
Thanks again,
Pat