[scoot]

Printing them and carrying them in a wallet that could be lost or stolen seems like asking for trouble.

[nine_k]

Unless you're a victim of a targeted attack, and the perpetrators know your accounts and go to immediately hijack them, it's a non-issue. You just generate and print new rescue codes, and the old codes become invalid.

[krtkush]

I keep all my secure codes in my password manager.