I try to cut them some slack, I'd probably ask people about their rides when they buy parts, too. Unless like mentioned they try to be smarter than thou. I do feel a little sorry when they have to deal with a bunch of idiot mexicans who want to argue about the price on parts, and will probably just end of wrapping a roll of duct tape around whatever is broken. I saw a minivan the other day that had three black steelies and one lowrider wheel on the front. Also had a big chrome resonator exhaust tip sticking out the back.
Before I go in for parts, I look the part up on the website, which usually will tell you if it's in stock or not. Then I just go in and give them a part number. Saves a lot of hassle.
83 cougar 466/c6/8.8 3.73s
73 torino gts/351c/c4