Malicious Security Crackers: "We used to take an account and try out about 40,000 passwords on it in about 5 seconds to see if it would unlock. LJ doesn't let us do that anymore. Damn that LJ! We'll show them! Here, have a malicious script!"
Malicious script: *takes 5 most commonly used passwords, tries them on 40,000 different accounts*
4000 LJ accounts: *unlock*
Malicious Security Crackers: "Score!"
LJ Geeks: "O RLY."
LJ: *stops allowing even remotely easy passwords*
4000 LJ users: "Hey! That was a perfectly good password! Why'd you make me change it?"
LJ Support: *facepalm*
See http://azurelunatic.livejournal.com/4817217.html for this and the rest of the story of what LJ has been up to this week :)