Not that it makes much difference (they're selling their mailing list in order to raise money), but a lot of the stuff folks complain about is not coming from the NRA, but a third party to which they've sold their mailing list.
The DVDs, wine clubs, etc are all probably sent by a third party-think someone in an earlier post noted the fine print sent with the DVD noted as much.
I've been through the same things as most in here, but I didn't let it raise my blood pressure. Don't remember how I did it (been so long ago), but I think I contacted both the NRA and signed up with the government's no call registry etc-I no longer receive anything from any of the third parties.
AFA the DVDs-you're probably just throwing meat to the lions by having any contact with them (they think they have you hooked, they just haven't quite set it yet)-if you really want 'em to stop, just:
1. Keep the DVD
2. Toss everything from 'em in the trash
3. You'll probably eventually get a call wanting payment for it, at which time you will inform the person on the other end of the United States Postal Inspection Service - Receipt of Unsolicted Merchandise rules/regulations (you did bookmark the earlier link, didn't you?).
4. While you're at it, tell 'em they're welcome to send any more unsolicted DVDs your way if they so desire (free is always good)!
I can guarantee you'll no longer have those folks bothering you when they know you know the score AFA unsolicted items, and they tend to wander off when you don't send money for the stuff they send you.
Ain't no use getting worked up over nuttin'....
