This is a bit like the comedian Gallagher's humor (with PC language):
It you see someone driving down the road with their turn signal still on, they're saying: I'm really stupid, I'm really stupid, I'm really stupid. . .
or
Everyone should be issued a rubber dart gun that you could shoot at bad drivers. When the police see a car with 6 darts stuck to it, they can pull them over and give them a ticket for being a jerk.