Boston.Com (Technology) published a list of the 10 most common passwords.
In descending order, they are; password; 123456; qwerty; abc123; letmein; monkey; muspace1; Password1; blink182; (your name). Or, for hams, "your call".
I wonder how many of the hams who claim to have their passwords hacked were using one of the preceeding passwords.
If you don't lock the door, don't complain when you've been cleaned out!