"Hey, there's this website which is a massive gathering of hackers, sociopaths, and general malcontents. They love viciously attacking people and organizations, sometimes just for the hell of it. They've got a long and varied history of causing significant damage to those whom have drawn their malignant attention. They would be a legitimately dangerous group to anger.
...HEY /B/TARDS, WE FUCKED ALL YOUR MOTHERS, YOU BITCHES!"
Who the hell thought this was a good idea? Even if AT&T did win the war, which is probably the most likely outcome, it's still a fight they didn't need to pick.