I am truly shocked at the number of users saying Blockchain.info can be safe. I hope you all know that you can put all of your precaution measures, one beautiful day it can be hacked this website, and all your precious coins gone, because hacker will have access to your private keys, and 2FA can do nothing in this case. Is it so difficult to move to a desktop wallet, where private keys never leave your PC ?
AFAIK all wallets stored in blockchain.info is encrypted, and its strength depends on your password. It took a very long time to break the encryption on each wallets (and in Blockchain.info there are much wallets, not just yours). So, if Blockchain.info is hacked, users will have enough time to move their wallet balances to their secured wallet.
I am afraid you have not understand what I mean by hack, I mean the website to go offline, once blockchain.info gets hacked, you cannot access the website, it will give you DDOS or 404 not found error, meanwhile during this time the hacker has all of the database wallets and their private keys, and the hacker has all the time to send those BTC wherever he likes. Its highly not advisable to use such kind of wallets. This is my last warning, you do what you like, I am tired of repeating why blockchain is not the ideal wallet.