Gallagher used to tell a joke that every driver should be issued a suction cup dart gun, that shoots darts with a red flag on it at any car driving like an idiot. When a cop sees a car with 3 flags on the fender, he pulls them over, and gives them a ticket for being an asshole.

Just hold one of your keys out as you walk by the cars on the crosswalk.

If you know no fear, climb on the cars blocking the path :p

Or a waterproof pencil. Just to warn the other drivers, that they don't know or care for traffic rules.

SMOOTH MOVE, EX LAX