This guy is my hero!

from http://www.boingboing.net/2008/03/05/man-creates-vigilant.html
Red highlight shows the awesomest part.

Man creates vigilante robot to battle drug dealers
Atlanta bar owner Rufus Terrill has built an armor plated remote control robot to video tape and chase away drug dealers and other unsavory characters who are causing problems in the neighborhood.

Late at night several times a week, Terrill powers up the 4-foot-tall, 300 pound device and reaches for a remote control packed with two joysticks and various knobs and switches. Standing on a nearby corner, he maneuvers the machine down the block, often to a daycare center where it accosts what Terrill says are drug dealers, vagrants and others who shouldn't be there.

He flashes the robot's spotlight and grabs a walkie-talkie, which he uses to boom his disembodied voice over the robot's sound system.

"I tell them they are trespassing, it's private property, and they have to leave," he said. "They throw bottles and cans at it. That's when I shoot the water cannon. They just scatter like roaches."