NEWPORT, R.I. — What song was No. 1 the year you graduated from high school?If you answer that question on Facebook, you may be the victim of "social engineering," the latest tool of computer hackers, according to Patrick Laverty, a computer security consultant who's organizing a June 16 conference on the topic at Salve Regina University's Pell Center.From information like that, a hacker can deduce the year you were born, a bit of information that a perhaps surprising [...]