I think transparency and the ability to opt-in is key. With facebook, I realize I'm using a free service supported by ads and trust they abide by their end of the user agreement to use my information only in the ways they say they will. When they abuse that trust, I may choose to opt out of their service. I don't give them any information I wish to be kept secret.

The NSA is not transparent and I cannot opt out of being monitored. Therefore, I do no romanticize about the free service facebook provides, but cannot agree with how the NSA conducts itself.