Criminals (I hate to use the word "terrorist" because it has a distracting political bias - we're talking about people doing bad things to other people) are not some sort of hyper-disciplined super spies. They do some pretty dumb things. A while back I met a guy looking to put together a Twitter system designed to combat drug cartels, who, yes, communicated via Twitter. This was several years ago, but still.
The whole reason I'm so upset about what the NSA is doing is because it works, and over time it will work much better than it does today.
The whole reason I'm so upset about what the NSA is doing is because it works, and over time it will work much better than it does today.