Hackers are threatening to expose information on over 30 million users of AshleyMadison.com, a website for cheating spouses famous for its tagline “Life is short. Have an Affair.” A group of hackers called The Impact Team reportedly has posted some data already and is demanding that parent company Avid Life Media shut down AshleyMadison and a sister site, EstablishedMen.com, according to Krebs On Security, a blog run by former Washington Post reporter Brian Krebs. The Toronto-based Avid Life Media said Monday it closed the breach in its computer system and was working with law enforcement. How the hackers got in,...