The Alamo Drafthouse down Austin way has long had a way with PSAs asking patrons to STFU or face the consequences.
Here’s Richard Linklater, the Godfather of Austin’s slackers and indie film scene, giving advice on how to deal with people who cannot put a sock in it during a movie, on behalf of the Alamo (Drafthouse).

Guy here in Tampa shot and killed a guy who was texting doing the previews,so that’s another way to deal with it.
Too soon. Too soon.