Wow, how precious, someone who believes in the system! It suppresses dissent subconsciously. You start censoring yourself. If you think there is a shred of humanity within any of the NSA or any of the alphabet boys, you're in for a ride.
Surely you're joking. The United States government is eager to punish dissent to a lethal degree.[0]
Second, planning terror attacks is not "dissent." I mean, if this guy is your poster boy for the goals of NSA surveillance, then you're arguing that it is about fighting terrorism.