A few years ago, I signed up for Baskin Robbins e-mail club, but lied about my birthday because I didn't want to wait 11 months for the free scoop coupon I knew I'd be sent. (My real birthday had just passed).
I never cash this coupon in however, because the paranoid part of me believes they'll card me when I try to redeem it. Every year, that free scoop e-mail is just an awful weight on my conscience.
I beat the system. And I'm worse off for doing so.