You were walking around the city and saw a girl yelling at a person.

Alice: "How many times do I have to tell people to not throw trash bags on the streets! Have common sense at least!"

You went to her and stopped her without knowing the situation.

Alice: "And who are you? You're telling me to stop? I'm a police officer. I'm just wearing casual clothes! So you don't have the right to stop me! I'm just doing this city a favor by keeping it safe!"