You need to go back and read my post more carefully.
People come to shops like this with a significant amount of mis-information and when they're told there idea/request is pointless/worthless or dangerous, they get quite upset and feel they're being talked down to.
I was at RC again last week when a customer came in making rediculous demands and asking the shop to do something that was not adviseable.
"SOMEONE on the internet told me to do this" was his motive, even after a professional tuner and engine builder advised against it he demanded it be done.
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