I did something similar to this today. I had printed off a bunch of the cactus coupons a while back, and never got around to distributing them, then found them in my desk a few days ago. I went to the Borders in the mall around here and slipped them into books, magazines, etc.
I plan on doing this again soon, along with putting up a few of the weight loss signs, and I'm very tempted to put up a few of the baby smasher signs in a babies-r-us or something of the like. I'll try to get a friend to snag pictures of the shenanigans when I do them for proof.