You Are the Parent
I had to yell at a lady in a theater. She had two young children with her. After the lights went down and the movie was starting, the kids were still running around like little maniacs. All I said was, “Shhh.” She screams at me, “They’re children!” I yelled back something along the lines of, “We all paid to see this movie. Yes, they’re children. You are the parent. Shut them up or get out!”
Story credit: Reddit / rational_discussion