Texting at a theater during a movie is just rude. Nobody wants that bright screen shining everywhere during the movie.
Alamo Drafthouse is especially known for being strict on this rule. They will kick anyone out if they text or use their phone during a movie. It’s great. Leads to less distractions during the movie.
The theater always makes it a point to make this rule clear before the movie. This time they used Susan Bennett, the voice of Siri, as Siri, to make the point.