Nice to see though I wont be using it. Is there a similar thing with ubuntu that you can do booting from a live cd or usb? I'd be interested in using that.
I haven't heard of Tails OS before. I looked it up. It is a live Linux OS which is bootable from DVD. The part got me worried is internet traffic is forced through Tor. I think using Electrum on Tails OS is ok, logging into Blockchain.info wallet would not be. Be warned.
I think it should be fine if just the transactions are going through tor, though like you said I wouldn't trust logging into sites like blockchain.info.