Sending a message to malicious computer hackers "squirreled away in their basements," U.S. District Judge Marsha Pechman sentenced a 21-year-old man to 37 months in federal prison for a global robot virus attack in 2004 and 2005. Christopher Maxwell launched the attack from the comfort of his Vacaville, Calif., home in order to collect commissions by installing adware onto the computers of unwitting victims.