I don't usually do MLP in this space. I try to always have something interesting to say, or (as witness by the fact that I often go weeks or months silent) say nothing at all. This is an exception.
Bruce Schneier is a very smart man, and he says we should not be afraid. He says that more eloquently and convincingly than I ever could, so I'm just gonna link to him.
What he's talking about makes me so angry that I can't even think about it, or I'll spend all week obsessing. Just go read it.