Got to stop people from doing things that they themselves are doing...
Anecdotally reminds of this guy that was key in setting up the British porn filter being arrested for child pornography: http://www.telegraph.co.uk/news/politics/david-cameron/10675...
A person is not a government agency ostensibly accountable to a democratic government and, therefore, public oversight. The NSA is. To the extent a democracy keeps secrets from voters, it is not a democracy. The US government keeps a lot of secrets.
The NSA does an awful lot of hiding things. It might therefore be reasonable to conclude that it is bad and should, at the very least have its funding cut.