I don’t like litter bugs.
Incorrect apostrophe aside, here’s how messages such as this should be handled. Unequivocal and to the point.
This on the other hand is just dumb. Do we really need sad little couplets to help us correct our behavior? Spare us the rhyming mnemonics and eco-guilt, and just tell people in no uncertain terms to stop throwing their effing trash on the ground.