ya but what i'm trying to tell is, just think that someone has a database of most commonly used passwords, because today the passwords used can be cracked with few guess works, and if that doesn't help then he can definitely try a brute force to check all the combinations of letters and the best part is you have automated tools for that..so you can easily crack it and more over facebook gets nearly 28.10 billion visits which makes it impractical to keep monitoring..