This is a linkpost for http://www.motherjones.com/kevin-drum/2016/11/cheating-olympics-epic-levels
Evidence that people will cheat if the expected benefits greatly exceed the expected costs. Update accordingly. Where else do you think people are cheating?
I have heard the rumor that drugstore products (e.g. shampoo, wrinkle cream) contain ever-declining amounts of the active ingredient, after the first product launches.