Funnily enough it turns out the FBI used Acxiom data to locate the 9/11 hijackers back in 2001[0] [0]: http://archive.fortune.com/magazines/fortune/fortune_arc

Funnily enough it turns out the FBI used Acxiom data to locate the 9/11 hijackers back in 2001[0] [0]: http://archive.fortune.com/magazines/fortune/fortune_archive/2004/02/23/362182/index.htm http://archive.fortune.com/magazines/fortune/fortune_archive...