Christopher Maxwell, a 20–year old in California, had a ball running a botnet of over 10,000 PCs. In fact, he got really lucky: He was able to get into a hospital network, where according to the Seattle PI, he “allegedly impaired patient treatment, delayed processing lab tests and surgery scheduling, and shut down computers in intensive-care rooms”.
Of course, he installed a slew of adware programs.
I’m trying to get a hold of a copy of the indictment.
(Hat tip to Ferg)