Rule of thumb at any theme/amusement park: If you see a group, ANY group, in matching clothes like that, you stay as far away from them as possible. There will be fights, they'll always try to run you over, politeness is an unknown concept, and they make ALL the noise in the hotel hallways when you want to sleep. Doesn't matter the skin color, ethnicity, or age, just steer clear.
Just saying....I was hoping to see some people in mouse costumes to rolling in with batons, shields, and pepper spray. THAT would have been worth the trip.