So I saw this printed on a wall in a cafe in Frenchtown, NJ:
"Children left unattended will be given espresso and a free kitten."
Also, I was crashing at a friend's apt along Old River Road in Frenchtown NJ, and his landlord, an old, single, retired man, had placed a tricycle on the very edge of the lightly trafficked dirt road alongside his house, in a deceptive attempt to get people to slow down while they drove past (it only worked sometimes).
Anyway, people tend to be jerks when seen in the greater social setting. I found both of these examples to be quite refreshing as a means for behavior modification. I wish I saw more things like this.