I love the NSA. It's like having a secret fan-base you will never see, but they're there, watching everything you write and it makes me feel all warm and fuzzy inside knowing that I may be some person's only form of unconstitutional entertainment one night.
I will agree that the guy has zero evidence to prove what he is saying and to speculate about such things while legal is not a good thing. There are to many paranoid folks out there that could hear something like this and go cookoo. However, the idea that the government wouldn't do horrible things to it's own people is inaccurate if not silly. Here are few examples...
Gulf Of Tonkin
CIA Mind Experiments
Japanese American internment
And here is something interesting from current day
For those of you who only believe something if it's own fox here you go
U.S. Makes Legal Case For Targeted Killings Of U.S. Citizens