Out of my 600-odd 'friends' on Facebook, one (1) is posting stuff about the NSA allegations. The other 599, are posting pictures of cats, music videos, snaps from vacation, reflections about life, et cetera. I myself am extremely reticent about posting on Facebook due to the recent revelations.
As a result, I am afraid Edward Snowdon's fears might come to pass, atleast in the short run. Not enough people care. They crave the short-term dopamine bursts that result from people liking their posts, or pictures, or videos. Getting them to set that aside and care about the fact that the Government might potentially have access to it all is a very, very hard task.
In order to do this, you have to get people to switch en masse to new, secure social protocols. In short, you have to build a Facebook alternative, an client-side encrypted webmail service, or a document sharing site that JustWorks, is secure, and doesn't require any terminal commands to access / run. Otherwise the majority of the population is going to use products from Microsoft, Facebook, and Google. You can use your encrypted webmail and identi.ca, but very few people outside the "tech-aware" world will communicate with you.