The guy who drove the tanker truck that exploded in Everett is officially Blotter material. Not only did Chad LaFrance have some driving trouble on his record, but he admitted to issuing a bomb threat in 1997. The Globe quoted what he wrote on a package at a UPS store where he used to work: "Tick. Tick.Tick. The time is running out. UPS Sucks. Danger. Explosive illegal bombs enclosed. Watch handling." His aunt called it......