When in doubt, use a brick

It's sad that the first though after the initial "haha, cool!" is that the bricks would be definitely be stolen after a few nights (if not after the first).

The premium version is called Cinder Blocks.

Bricks for all 2 wheeled vehicles are needed to counter the bumper car piloting phace grabber zombies

I suppose these could also be used for excessively noisy vehicles.

Ever feel unsafe crossing a crosswalk

Civilised people - "Er, no?"

Also the very fact that uncivilised people need the bricks, proves that someone will steal said bricks anyway