The Untied States is a big country. I would imagine it varies between different regions. I live in Canada, in my local area moviegoers are usually pretty quiet and respectful. But we get a PSA at the start of the movies warning people to be quiet and stay off their phones, so it seems the theater chain has had issues. And then there was the Minecraft movie, which I personally didn’t see, where people acted like idiots at the theatres because of a stupid meme. My cousin who worked at the theatre at the time said they had a lot of issues with that one. Apparently there was a fire at a theatre somewhere in the Untied States when people brought fireworks to the movie