And in other news.. Water is still wet... Duh! i think by now we're all pretty aware the NSA was and is spying on pretty much everyone.
it's actually fairly common for any fairly new generation firewall that does Deep Packet Inspection for Intrusion Prevention, Content Filtering, etc. The firewall has to be able to view the data unencrypted to scan it for the "normal" stuff. Nothing overtly hostile in the intent there, just the way it works.
It goes beyond that though... AT&T already charges a higher prices for the "unlimited data" plans for their smart phones than almost any other carrier in the US... Plus they shouldn't brand it as an unlimited plan if they don't mean unlimited.