He can he has and he will, that's why if you use blockchain.info and have backups of its encrypted wallets, you better backup the whole repo's zip archive off github or at least the part the lets you decrypt the wallet.
There are several wallets that can import the Blockchain.info encrypted backup files, so you don't need to back up the entire site. Fortunately, as otherwise noone would be using the site.
Could you point me in the direction for those other several wallets? I have my blockchain.info wallet backups, but now that their service is offline (for upgrading from Mac Mini to Dell server) I really need to move some funds quickly.