Ok so I work at an amusment park, and I think I may have found one of the stupidest people on the planet. I work on this ride called the racer, it's two identical coasters, just mirrored, that sit right next to each other and race. Now what most people don't know is that we have a camera on the lift hill because 99% of stupid things people do are on the lift hill, because they think we can't see them. So anyway, my friend is in the drive box looking at the camera, and some idiot takes off his seatbelt and starts hitting the other coaster train with it (on the lift hill they are side by side). We have to emergency stop the ride, and send one of the associates up to make him stop and put his seatbelt back on. So this girl goes up and tells him to stop and his first response is "you didn't tell me I couldn't do that." She about punched him. Of course we had security waiting for him, let's just say he's not coming back for a while.
Anyway, share your stories of stupidity.