Three men have been sentenced for their roles in a wide-ranging hacking and spamming scheme that targeted personal information of 60 million people, including Comcast Corp customers, prosecutors said on Thursday. Timothy Livingston, 31, was sentenced by U.S. District Judge William Martini in Newark, New Jersey, on Tuesday to four years in prison after pleading guilty to charges stemming from his role in a scheme that prosecutors said generated $1.3 million.