I have just seen a commercial for the "Fuel Doctor Fuel Efficiency Booster FD-47". For those of you who are unaware, this is a hollow plastic shell that plugs into your car's cigarette lighter and contains naught but three LEDs and a circuit board that apparently serves no other function except to painlessly separate the gullible from ~$50.
Personally, I think the government should slash taxes and entirely fund its operations by selling things like this, lottery tickets, and ziploc bags of rocks. Stupidity is the most abundant element in the universe after hydrogen, and it's infinitely renewable; when combined with gullibility, the reaction is phenomenally powerful. Isn't it time we put it to work?