He was detained by the FBI after returning from overseas on a tip that he was hoarding explosives in Florida, a series of polygraph tests cleared him. Because he travels over 70,000 miles a year via air, the FBI gave him a phone number to call when he traveled to avoid hassles. He decided that if that can keep him out of the FBI's hair, he could potentially avoid Gitmo by putting his entire life online -- a photo of the Big Mac he had for lunch, one of the Starbuck's he's having right now, real-time monitoring of his movements via GPS, snaps of debit card receipts, etc. His entire life online.
http://www.wired.com/techbiz/people/magazine/15-06/ps_transparency