ANOTHER REASON TO FEAR BIG DATA

Let's start with part of a dissent by Justice Breyer in a 1998 case:

First, the complexity of modern federal criminal law, codified in several thousand sections of the United States Code and the virtually infinite variety of factual circumstances that might trigger an investigation into a possible violation of the law, make it difficult for anyone to know, in advance, just when a particular set of statements might later appear (to a prosecutor) to be relevant to some such investigation.

I got Breyer quote from this Washington's Blog post which points out that given enough data on any person, it's extremely likely that a prosecutor could bring charges. This could be a powerful force of political and/or economic repression.