AT&T had best be careful. People get awful cranky about stuff like this, especially if they have competitors that give their customers a better choice.
FirstUSA (owned by BankOne) changed the way they processed payments. They used to give a grace period of several days after the due date, and if a payment was received during that time, they wouldn't assess a late feel. Well, some accountant figured out they could make more $$ by strictly enforcing the due date.
So they did, without sending out any notices. Pissed people off, FirstUsa lost over a million customers within a few months, which was one of BankOne's bread and butter incomes. BankOne lost a lot of money, missed projections, stocks fell. Top 2 guys of FirstUsa were forced to quit, people were laid off, and John B, McCoy, former head of BankOne before the merger with the Chicago bank, took over. 6 months later, he bails and decides to retire. I don't know if they've recovered yet or not.
Personally, I figure the worse credit rating I have, the less likely I'll be a target of identity theft. And even if I am, they can't get any credit with it. So I'm safe.