yes people are that dumb.
When I was a mechanic in the army I'd get the butterbars to jump up and down on the back of the tank to check the shocks, or hold a baggy behind the tank to get an exhaust sample (if the baggy didn't melt LOL), and more.
My wife has a friend that can even fill her wiper fluid, takes it in to get it done at the dealership (till I found out and do it for her now)