I recently heard of someone who got ripped off. Cannot remember who or where. Goes something like this...
Situation:
Thief took a jerry can of gasoline that was tied back there on his rig.
Solution:
He took another metal jerry can and filled it up with gasoline and Liquid Draino. Placed it on the rear rack.
Result:
Neighborhood kid was seen on side of the street by his house with his brand new truck on lifts; removing gas tank.
Little does the kid know that the Draino will eat all the gaskets and rubber seals too. Ha Ha Ha

2002 4dr Kia Sportage 4X4
Tires:235/75/15, Wheels: Black 15x8 Steel ProComp 2.5" B.S., Hubs:Warn Manual, Lift:3" UPYOURKIA, Trailer Hitch, Cargo Rack, Clinometer.