They don't think they know how stupid we are; they know it. They know this will all blow over and they'll be allowed to merge.
I am hoping from the bottom of my heart that this merger doesn't happen, but at least if it does I'll have a way to back out of my contract with T-Mobile. I will not be an AT&T customer. Never again.
That's not it, at all. They know that even if the the merger is blocked, T-Mobile is screwed. It's unverified by T-Mobile but customers appear to be leaving in droves, customer service is starting to suffer since the reps know they won't have a job in a year, and network improvements will stagnate leaving them so far behind the competition they'll look like Danica Patrick in a Sprint Cup race! Back to being serious, this will be just like what happened to Sun after the Oracle buyout was stretched out into eternity. The only difference is that T-Mobile was viable before buyout talk started and Sun was a zombie.
No matter what happens, buyout blocked or not, AT&T has one less competitor. No matter what happens, we (and especially T-Mobile employees) lose.