The Sony hack was just a bit of fun compared to what could happen if Facebook gets taken out.
Every so often, someone complains about a PC meltdown made all the more catastrophic because they had no data backups. At this point, there’s no excuse for that, except laziness. Inexpensive hard disks are available everywhere, while apps and programs will auto-backup your files to the Internet.
But recently the complaints have begun: people are losing data in the cloud. Someone gets kicked off their account, and the data is destroyed. Or someone makes some crazy mistake and the data is over-written, destroyed, or never archived properly.