These people are gross criminals. The fact that none of us want our computers ruined by them pales into insignificance when you consider the serious side of potential damage. These programs can affect emergency services, air traffic control, nuclear power plants, traffic lights, hospitals etc etc. There is a potential for serious loss of life, plus countless millions of pounds worth of damage. The minimum sentence should be at least twenty years WITHOUT any chance of time off for good behaviour.
He is assured fame and notoriety for the rest of his life. I would bet that he will be working in programming or SQL, in 10 years and earning nega-bucks a la Mitnick. He wouldn't be a bit of a porker perchance?