Sorry to here that happened.
Universal's security doesn't play games with the tourists. I know you're not guilty, but I'm surprised they didn't take to security HQ to discuss the problem. They have to deal with all forms of trouble from unruly drunks from City Walk to knife fights in the parking garage. I've seen many draged off property when I worked there.
I've been to Halloween Horror Nights once. I'll never go again. Way, way too crowded. Was only able to see two horror attractions before closing because of the long lines. Never again.
Found the statute you're looking for.
Go to statute 784.03. Good luck.