The last shop I worked , they loved to have me talk to customers and tell them how to fix thier own cars(so they can save some money and avoid paying me). There were several times when after talking to the guy for a minute, I would say,
"I'm not telling you anymore. You are going to end up hurting yourself or someone else when you try to do this your self. Then I will be liable because I led you down that path. "
Like some moron that wants to take apart the steering shaft on his Expedition and drill holes in the U-joints to install grease fittings. Or the guy that thinks he will replace his CV boots himself, but does not know what a steering knuckle is.