From the Alamo Drafthouse's youtube page for the video:
We do not tolerate people that talk or text in the theater. In fact, before every film, we have several warnings on screen to prevent such happenings. Occasionally, someone doesn't follow the rules, and we do, in fact, kick their asses out of our theater. This video is an actual voicemail from a woman that was kicked out of one of our Austin theaters. Thanks, anonymous woman, for being awesome.They deserved for their ass to be kicked out.