A few years ago there were this guy here who went apartment to apartment offering to install peep holes in doors...cheap. He recieved a lot of requests, and the following week the man went to those apartment buildings to satisfy his customers. He knocked on the doors, recieved payment in advance, around $20, and went about his business. He measured the distance from the floor to the would be hole, pulled out his cordless and drilled. After he was finished he explained to the curious customer that his colleague would be along shortly to install the peeper. So the customers waited and waited and waited. No one showed up. The duped customers weren't only out $20 cash, but they also had a fresh hole in their door for their trouble....oh yeah, when the guy was caught he had already earned over a thousand dollars.
Darmstadt area.