There are all kinds out there.
One memorable one....had a customer who wanted a fairly basic survey/recce job in an R44. Summer, some altitude, neither of us is small, in an Alpha, and I was unwilling to put it into all the little holes he wanted. He started (with the blatant assumption I was another 100-hr pilot, ink still fresh, etc) telling me how his experience exceeded mine, I should learn to listen to him, that he needed to get it all done today, etc, etc, etc. I let him go on for a while then explained I was one of the company check and training pilots, was more than willing to call it a day if he even hinted at second guessing me again, and I would be on every charter he had with us in the future if this continued. After some discussion, we found some middle ground.
My point is, these guys are out there, they are ultimately paying the bills, and finding a way to deal with them is necessary.