A Hollywood hospital was hacked a few weeks ago and was essentially unable to operate. The hackers demanded 40 Bitcoins, which comes to about $17,000. This is considered "ransomware," where the hackers get you to run malicious software through a bogus updater like Flash that appears to be legitimate. This malicious software encrypts all data and threatens to delete everything unless you comply with the demands within a certain time frame.
The hotel contacted the police and FBI, but law enforcement was unable to identify the source of the hack. The network was offline and staff was taking handwritten notes on patient data. This is a strong argument for keeping important computers offline except for those necessary to have access to the internet.
Read more at latimes.com.