Clever? Or Setting Himself Up For Retaliation?

The landscaper works one property with a thief or two on it. Recently, while working there, things have gone missing from his trailer, cans of gasoline in particular. He devised a plan I'm not sure I altogether agree with. He put a little gas in a can and filled it up with water. Then he left it on the trailer to get stolen, as it did. When he comes next week, there may be a follow up. Maybe the thief will have learned his lesson, maybe he will take it a step further in some way . . .