You have more chance of winning the lottery or being struck by lightning than you have of cracking a vb users password from their hash, not to mention you need a bit more processing power than your average (or even 'powerful') desktop pc. Anyone who claims they crack their members passwords via the hash is lying - even on the minute chance you were very lucky and managed one - everyones salt is different, so the same password has a different hash for each user. Much more likely they simply used dictionary attacks.
.... I have a few members who are well known as hackers on my forums so I'm thinking of cracking up their passwords on my forums and see if they work on THEIR forum so I can gain access to their ACP and their stupid ass hidden forum which has all the info of hacking vBulletin sites.
No talk about illegal activity on our forums, thread closed!
If you think you are hacked by someone, contact your local authorities or the host/ISP of the hacker.