Memory aid

I snapped this while in the checkout line at a supermarket, by way of perfecting my spying skills. It doesn't look to me as if that little note gets changed very frequently if at all. It is number 277 in the list of bad passwords, not even in the top ten among numeric passwords.

The mind reels. A determined band of thugs could gain access to the register and give themselves DOUBLE COUPONS with abandon.