Comcast, not AT&T, but my mom recently discovered that her Turner Classic Movie channel was not longer activated. After talking to someone on the phone (who suggested a service technician visit), she independently discovered that TCM was being moved to a sports package along with a military history channel and a country music channel.

It was a watershed moment for her. Apparently, there are online services that provide TCM, and now she's considering downgrading her cable service rather than upgrade it and getting an online service to make up the difference.