We had a not so nice experience with this too! We'd eaten dinner at the Concourse Steakhouse and decided to ride the monorail to see the view and just waste some time off our feet. It wasn't busy at all when we were there. We asked the CM at the gate and he was really nice about it, but when we rode at the front, the pilot of the monorail acted almost put out by our presence! He wouldn't speak to us at all and would hardly even look at us. We were so uncomfortable. We even tried to engage him in conversation, but he just gave us one word answers and very obviously didn't want to talk. After we made the circuit, he handed us the co-pilot's cards like they were no big deal. Fortunately, my 9 yo DD didn't really know anything was amiss, otherwise I would have been fuming!

Trust me, I'm not some Pollyanna who expects "happy happy joy joy" all the time, but this CM really made my DH and I uncomfortable!
That was our only bad experience with a CM, I'm happy to report. He must have been having a bad day or something, but IMO that really doesn't excuse rudeness. I used to work retail and I never let my moods affect the customers.