Just wanted to add my 2 cents. When I first got into this business, 16 years ago, a wise man told me that not everyone who walks in your front door is a customer. That is why there are lots of other shops out there. Sometimes you talk politely, like the Ranger did, and invite them to go elsewhere. Sometimes it is just a personality problem. I have one customer who does not like to talk to me, but loves my partner. Doesn't hurt my feelings at all. It has always bothered me when people complain, after the repairs, about something that was explained and agreed to before.
The same man once told me, it is not how you handle the things you do well, but how you handle the problems that will ultimately improve your business. Boy was he right. If someone is upset, they will tell a lot of people. It is worth something to mitigate that.
Kelly Wilson