If I were in TX right now, then I'd go up and kiss Alamo Drafthouse Cinema CEO, Tim League, smack-dab on the cheek as it was he who decided to use the obnoxious rant of a disgruntled customer as a PSA trailer in front of all R-rated films. The tirade this "86ed" customer made is filled with expletives, and, sadly, can't be shown before all films.
As far back as 1997, Alamo Drafthouse Cinema adopted a NO TALKING policy that would now seem to include all manner of fiddling with ones electronic gadgets, too. This particular "charmer" had been found to repeatedly disregard that rule and text on her cell phone during films. She didn't stop; they gave her the boot.
Remember....(no talking/using cell phones in) the Alamo!