[WheelmanSS]

Vandals are cowards. They tend to keep doing it until they are A. caught or B. confronted.

See if you can organize a neighborhood watch, or maybe setup a homebrew survellieance system.

Both act as a good deterent, as these punks will notice the increased security and move on to be idiots somewhere else. Or, if they are too stupid to risk it, you can catch their asses and have some sweet justice.