On that image before, I don't know what the worry is with remembering complex passwords.
If you use a password with lots of replaced characters, then fine.
All you need to do is write the password down somewhere safe. A piece of paper in a sock drawer or what have you.
No one is going to be using spy cameras to get your password in order to leech of your WiFi.
And if your house is robbed or broken into, no thief is going to bother stealing your password. They'd rather knick your computer and dvd player. They're certainly not going to steal the password and then come back to sign in to your WiFi.
Difficulty in remembering a password for WiFi is not a valid excuse for not using longer safer complex passwords.
