Let me Godwin that discussion fast... Just remember that Hitler, with a few
Hollerith machines, which aren't even considered computers by any definitions of the term, managed to classify, sort and exterminate millions of people, just imagine what a malevolent dictatorship could bring today. Think we are past that ? Well, it looks like the Front National, France's extremist and racist party, is posed to win the next election due to the usual two main parties being full of shit and full of themselves (not sure there's a difference there).
Now the million dollar question is: do you really want to give the keys to (in this case, french equivalent to) the NSA to such a party, even if democratically elected ?!? Really ? The best solution is to never build a mass listening aparatus in the first place. Pass laws making it impossible. Buid an anti-NSA whose life work is to search, target, disrupt or destroy by whatever means any mass spying operations.