Forum attacked by spam - need to delete all data

[skubaman]

Hi, just a few hours after installing a new Vb 4.2.1 it was attacked by spam bots. It now has thousands of users, which I have deleted. But it also has over 50k spam threads. Can't figure out a quick way to delete all of them. I tried deleting the entire forum but it keeps quitting on me.

I have already disabled the forum as well, but somehow there is traffic trying to access pages and it's tripping my server. I keep loosing mysql and other server services with the attacks.

Any suggestion on how to best deal with this?

Thanks so much