That's enough power, right?

This one happened a while back but I was reminded when I saw the same nimrod buying plastic conduit and PVC plumbing fittings.

Last fall this guy comes in wanting to buy some parts to hook up a new electric dryer. He explains that the house used to have gas but that he was recently given a used electric dryer. Fine so far. I ask if he had a 220V line at all in the basement. No. What kind of feed did he have running into the circuit box? He didn't know and it wasn't a circuit breaker box but old Buss style fuses. He had two 20 amp fuses in the fuse box.
There's no way this house, which was probably a converted summer cottage, had enough service to provide power for an electric dryer. I tell him so as politely ask I can but by now he's gotten some spark of imagination and starts grabbing parts off the shelf. Just enough to do some damage.
His buddy, another salesman, and I spend the next ten minutes trying to convince him that he's not qualified to do this and that he's likely to kill himself, set the house on fire, or both. He agrees to call an electrician but I watch him grab some "How-To" pamphlets on his way out the door.

The healing properties of paint

Last night this guy comes into the store looking for tub refinisher - "his friend told him we had some." I'm pretty sure I know what he wants so I lead him to the paint department where we've go the Rustoleum Tub & Tile Refinishing Kit - a pretty snazzy product.
As it turns out this guy had just bought a house and "his wife" was cleaning the tub and scraped away what she thought was dirt only to find it was a patch over a hole in the bottom. So now I'm trying to convince him that the paint, while it may make the tub look nicer, has to come after he repairs the tub, preferably with a professional repair kit. He could probably even get away with an auto-body repair kit like they sell at the car-shop just three doors down.
"Nah, I'm here already, I'll just get this.