If that was accurate 95% of people would have stopped using Facebook when the NSA's wiretapping was uncovered. Last I checked Facebook hasn't missed a beat
They need facebook because they like their friends. Its immensely important to me that the government stop tapping my phone, but if you think the fact that I still call my grandmother is a sign of consent, you're a fool.
Most of the non-technical people I know are very VERY upset with facebook and privacy, but are still using it in much the same fashion as they're still using their AT&T phone or Comcast cable despite their distaste for policy.