Many years ago I was the service manager for a local computer store (remember them?). My best friend owned a competing computer store across town. We always had a good matured rivalry going on.
One day my friend calls about a PC he got in for repair. He tells me that the customer said that we had worked on the PC last. He asks me some questions, and I told him that I would have to ask the tech Jeff about the repair. I go and find the work order. I tell my friend that the major problem we found with the PC was that the customer is a total idiot.
It turns out that my friend had me on speakerphone (which he seems to have an annoying fascination with), and the customer was standing right there. He learned not to do that again. Me, I really didn't care that much. The customer was pain in the ass, and a total jerk in general, so I wasn't upset to see him gone.
We always tried to take great care of customers, especially ones that need a lot of hand holding. But when you get someone that doesn't understand computers, and they act like a total ass when you try to help them, what can you do?
My friend later regretted trying to help this guy also...