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This should be used as an example of why the NSA's capturing of 'metadata' is really a problem. It's basically the same thing and is a big deal.

Sucks that Uretsky couldn't help himself to get a sense of what the Clinton camp was thinking tho

Another point worth making: this is the same type of (meta) data that we use to target drone strikes.

Anyone who says metadata is harmless hasn't been paying attention for quite some time.