AT&T are hands-down the shadiest mofos operating as a business in this world. From small print-approved snooping on your data, to no-tell-em fees that just pop up all the time, the customer's best interest is the LAST fucking thing they could care about.
We recently cancelled our business internet/phone with them, because they were adding on all sorts of 'additional value-added services' without even asking us(totaling hundreds per month), and our bills were(without the charges from these services) more than double what we were told they would be when we signed up. I have heard from several other people that this is the case for them as well - not sure if it's a regional thing, but everyone I asked was in the Midwest.
They have no respect for regulation, the law, or common decency, and the sooner that former-monopoly branch of an evil empire implodes, the happier I will be. Unfortunately, the only way this will happen is if you - the consumers - vote with your feet and stop allowing them to do this to you.