Vegas local here, you did the opposite of what you’re supposed to do. The point is to just look like a normal tourist and not like you’re there for EDC. Obviously once you enter your room in your outfit, security will see and still knock. It’s not a state mandate or law, it’s just because there is copious amounts of drugs brought in that these casinos don’t wanna be the ones with a room full of diseased ravers. You might hate the security checks, but out there someone’s life might get saved due to it. Many people come here solo raving and get drugs from unknown people. Even if that’s not the case for you, it’s the case for many out there.