Blue The Dinosaur — Payless Drugs, 1991
See if you can follow this: there’s this dinosaur, and he’s imaginary, but he lives in the time of other dinosaurs, and the other dinosaurs can see him only when they don’t do drugs (I said when they DON’T). If they do drugs he fades away into nothing. So the imaginary dinosaur tells real dinosaurs not to do drugs while he walks around in a T-shirt with the Payless Drugs logo, which means he has the word “DRUGS” front and center on his person while he’s telling his friends to not take them. Point is, you can’t prove it never happened.