Xkcd, the popular "webcomic of romance, sarcasm, math, and language", recently posted a strip about the paradoxical in humans trying to create hard to guess passwords.
Through 20 years of effort, we've successfully trained everyone to use passwords that are hard for humans to remember, but easy for computers to guess.
The comic even resulted in a Simple Strong Password Generator.
I always wondered who the next Justin Bieber would be...
It's a case of words inside other words.