>I think most people don't care much about privacy for themselves ("I have nothing to hide") and are happy to let military intelligence daddy read their emails, as long as it doesn't affect their life.
I'd point out that the DoD is purchasing this data from private entities, not collecting it themselves.
As such, I'd say that it's less about government surveillance specifically, and more about surveillance in general.
Corporate surveillance is nothing new (Equifax/Experian/etc. have been doing that for at least half a century) and those folks collect, store and correlate enormously more data than does the US government.
There is a massive effort by corporations to hide this sort of data collection, which has been mostly successful.
Complaining about the government dipping into all that tasty, tasty data is like blaming the child who was sickened by stealing a cookie from a batch that was poisoned, then making sure that the rest of the batch is fed to the intended target.
That most folks are just complaining about big, bad government (which isn't wrong, but just a tiny portion of the larger issue), rather than the folks who are collecting, correlating and using such data to their own advantage (of which selling it to governments is just chump change) seems rather silly and short-sighted.