Most certainly 100% yes. Here's a pretty swell talk on some of the programs they use to do it.
http://mirror.as35701.net/video.fosdem.org//2014/Janson/Sund...
http://mirror.as35701.net/video.fosdem.org//2014/Janson/Sund...
I'm off to create a few phony shell corporations to get some free NSA money and get paid to surf the web!