That's the response I came to give. My only real issue with CMs (on the phone and at various service locations) is telling me something I know isn't true because they don't want to admit they don't know the correct answer.
I haven't seen any bad CM behavior that I couldn't shrug off, but if there's a common denominator with the CMs who do or say something unpleasant, it's usually someone who is doing a traffic control job at a hectic time or location. I see this as yet another symptom of Disney trying to cram too many people in.