If you have an issue with a crew member, please tell someone in a red shirt at the time. Feedback is helpful, but it is hard to address it once the show has finished.
Sometimes, it is a simple matter of asking that crewmember to re-phrase the way they say things in future.
As a first timer how are you meant to know what colour tshirts the managers wear?
If you'd like me to be specific about a crew member being rude then I will certainly email whoever is in charge of such things. One guy told me how sh*t a certain Doctor was compared to the actor that he liked. I don't really care what your stewards think to be honest, I was just minding my own business waiting in an autograph queue.