Theater Etiquette

What happened to the basic social contract that we all made to not be awful when we are out in public? The times when you could sit through a movie in peace are long gone, so are we now just expected to tolerate all the annoyances that people bring with them to the theater? This is not the first time we've talk about this topic (here), and it probably won't be the last. Hopefully someone hears this, and decides that taking their shoes off while setting up their Tinder account during the movie, is a bad idea.