Most non-profits can flag you in their data base not to receive internal
advertising. I suspect AOPA is the same so I'd recomend you give them a
call and ask them to do so.
As for their "propaganda e-newletter," you can unsubscribe to that. I
recomend subscribning to AvWeb's newsletter (
www.avweb.com) instead.
They have extremely good reporting and it is impartial to the alphabet
groups.
Helen