Dialing for Dollars

In 2009, some iPhone users in the Netherlands who had "jailbroken" their phones -- or modified them to run unauthorized applications -- were shown a text-message warning that their devices were hacked. The message led them to a site where they were told to pay five euros to secure their devices, according to Wired. The hacker was able to scan a Dutch cell phone network for the hacked iPhones and use a default password to access the devices. The hacker later apologized and released instructions for reversing the attack.