Postage
Hmm, I realized something quite awesome, that I apparently had realized before, as I read maddox yesterday. You can bug the people trying to get you to sign up for a credit card by sending them 'valuable coupons' in those 'business reply' envelopes they send with the credit applications. It isnt illegal because, hey, you're being sent them without consent, and who knows, you may be your own company. So, if, in fact, it is illegal to send coupons to a business, then just say you are also a business and make up a name...then sue the ppl sending you the coupons.
That'll teach them to send you their spamvertisements...
And plus, it requires no postage. So everyone wins. Except the spammers...because they got sued.