Nothing. That actually is a method that's been used by "evil doers" in the past. The government had been monitoring email correspondence using Carnivore. What they found was that instead of sending emails back and forth, a shared inbox was being used, and information was simply being communicated using progressive edits of email drafts. It lived on a server, so it was available for discovery ... but since nothing was flying back and forth, it took awhile before it was detected.
What equally stops someone from simply logging in using those account details, deleting all the files, or simply changing the password? Feels like whack-a-mole to me.
Its a way of having your work everywhere, imagine being able to know that millions of people have your work on there computer, and seeing it read and blogged about, i guess its exciting.
Is this a article flagged up because of its affiliation with tis owners and how they have changed in writing or do you really want us to see people who ove google and mac related products that much?
Say I upload 50 divx films, and give out that accounts details, so people can freely take what they want, or even add files?