Why do passengers seem to think they're smarter than we are? It seems like every time I'm riding in the back of an airplane, there's somebody who waits until the seatbelt sign goes back on halfway through the descent, THEN gets up to use the bathroom. Nobody pays the belt sign any regard, and I've seen pax get upset with the FA for telling them to sit down. This is unbelievable! I'd like to see a new position created that puts federal agents in the back of planes to fine people who disregard the belt sign.