The obvious question is what actions should Obama and Murdoch take, since both men were completely unaware of the illicit conduct that was taking place on their respective watches. The answer is both men did all they could do but for obvious reasons their responses could not be the same.
Rupert Murdoch is almost certainly the most powerful person in the most influential business on earth. And yet he is treated as a kind of innocent bystander to the criminal activity allegedly undertaken in his name.
A scandal that began with The News of the World's hacking of Prince William's voicemail, to ascertain, of all things, that he had borrowed an editing deck from a friend at a rival news organization, has spread to potentially thousands of individuals.
If there is one thing to keep in mind, it is this -- hackers don't follow traditional fault lines. At any time, you can be the flashing red dot marking the epicenter of a major safety, security, and privacy earthquake.
Most journalists know someone who knows someone they could contact if they wanted to hack into phones. I've never hired a hack to hack. But in the British tabloid world, competition for scandalous scoops is much more cutthroat than it is here.