Umm... I have AT&T and I could cancel all text messages from their setup website or by calling customer support. The messages just went into a blackhole and I n

Umm... I have AT&T and I could cancel all text messages from their setup website or by calling customer support. The messages just went into a blackhole and I never saw or paid for anything my friends would send me. Of course I share unlimited text with a "family" plan that me and 5 friends are on. But the opt-out for texts still exists last I checked.