It might be a bit of a hassle, but if you encounter a CM who is being rude just ask to speak with a coordinator or manager or go to guest relations and speak to them about it. I had a couple bad days at work where I was a little short with guests and I was complained about. My coordinator talked to me, gave me a quick break to clear my head and I was fine and back to the happy attitude I normally had at work. CM deal with a lot of bad attitudes all day and there is a good chance that if you have a bad experience with one then another guest may have did something to put them in that mood right before you. It is never right to just assume they are always rude. Sometimes you might just get caught at the wrong place at the wrong time, but there is always someone else at Disney that will work to make your trip more magical.