"improper etiquette".

calling around , shopping for prices ....that's a No-No
calling for a price then not showing up to buy it, ...that's a No-No.
asking why things doubled since last year, ...that's a big No No.

they ask you all kinds of irrelevant technical questions when you buy parts, ...answering any question incorrectly, ..that's a No No.

EVERY time you go to the store or call in, they make an entry into the computer.
they don't tell you anything, but screw up too many times, no soup for you!

"MAN! i called in and you said the part was here!, i drove all the way out here and now you say not in stock?
didn't you check when i called on the phone?

... ....?