I also encountered rude behavior -- in my case, it was from one of the staff in the photo gallery.
A guy helping me on the Fantasy in the photo gallery really wasn't rude so much as clueless. He didn't want to honor the "free" photo ticket I had won in the casino. He claimed he had never seen one and said no. I explained I had won it in the casino. He still said no. When I said I will take it back to the Casino Management and tell them it is worthless he changed his mind in a snap!
No crew member should be rude or condescending to a guest regardless if they are contracted from outside sources such as the spa or photo gallery.