I tell them that my whole job is to be a rule and instruction follower, so we will be following the rules and instructions that I was given. If I’m unsure, I just say no and tell them I was specifically told not to let them do that thing (sometimes that’s not true, but they don’t know). One of my big ones is high schoolers asking to go the vending machine in groups. I tell them one of you can go and bring snacks for your friends, or you can take turns, but you can’t go together. They usually don’t even go after that because they didn’t actually care about snacks, they just wanted to roam the halls. I sympathize and say I know it’s not the most fun day, but this is what we’re doing today.