Freakonomics discusses the exact same factor with drug dealing and the oldest profession - adding risk to the seller results in increasing margins which attract

Freakonomics discusses the exact same factor with drug dealing and the oldest profession - adding risk to the seller results in increasing margins which attracts more sellers; whereas adding risk to the buyer results in the margins dropping too low to be worth even a small risk for the seller. Also, when I see somebody on a re-sprayed bike, that hasn't obviously been re-sprayed with purely artistic intent, I want to beat them in the face until they die (lost too many bikes myself).