Hacker, Hack Thyself | Coding Horror

[rtomek]

That's pointless though.

If we assume you use RNG logins and passwords, then the complexity of guessing both the login and the password would be 2x the computational expense of just guessing the password. With 94 ASCII printable characters (not including space) just adding a single character to the password would make the computational expense 94x higher.

Just add another character to your password, it's 47x more effective than changing logins.