Hacking a facebook account refers to foolproof methods such as Phishing, keylogging, Social engineering etc.
However the terminology cracking refers to the methods such as Bruteforce, Dictionary attacks etc.
Brute Force Attacks
Bruteforce is one of the most common and most reliable password cracking methodologies. A bruteforce attack tries all possible combinations against the medium, until the correct password is found. However the problem with a bruteforce attack is that as the password complexity increases, the time taken to crack a password also increases.
Is It Possible To Crack A Facebook Account?
Coming back to the main topic of this article. A few hours back while I was watching hacking related videos on securitytube.net, I came across to a video in which the hacker claimed that one can use "Hydra To Crack A Facebook Password". However here is why a bruteforce attack won't work against a facebeook account.
Facebook and all other popular social networking websites lock an email account, after few unsuccessful login attempts. They either have introduced an "Account Lockout Feature" or they either have introduced an "Account Lockout" feature, which prevents an automated password cracking method to work. However, even if you get it working, A minimum facebook password length is about 6-characters. kindly refer to the chart and find out your success rate.
Likewise, if you have any questions, Feel free to ask.