Shit anywhere FTW. Especially in the cowl, so when they turn on the a/c it smells like shit. LAWLS. I got a bunch of this shit
Let all the air out of their tires, for added fun, superglue the valve open or shut, and theyll never inflate it again!.
Superglue the key holes, so they cant lock/unlock the car from outside.
Shove a potato into the exhaust, and cram it in there with a rod so they cant see it.
Disconnect the battery
Cut battery wires.
Pull the main ignition fuse, they wont be able to start the car, and not much wll come on until they replace the fuse!
Put a zip tie with something metal dangling underneath the car, so they hit bumps and hear stuff lawl.
Turn their license plate backwards and upside down so only the metallic part shows and its upside-down.
Piss on the car
Write messages backwards on the windsheild so they can only read it from inside the car.
Pop their hood so that when they drive down the highway, it vibrates up and down, and scares the shit out of em!
Steal the car and park it down the street out of sight
I got a whole bunch more