When your web posts come back to haunt you

Intelligence gathering

Online profiling with data freely placed into the public domain doesn't require a warrant to collect, and intelligence services collect it enthusiastically. The respected Christian Science Monitor newspaper reported in February 2006 that the US government was already developing systems to mine the data trails we leave in cyberspace. It's also thought that the amount of data collected by the US National Security Agency grows by as much as four million gigabytes per month. However, how difficult is it to mine data in this way?