Re: So what the hell...

Unless the 'incident' happened within mere moments of the initial setup then yes, agreed. It's been a while since I've played with WordPress (see comments by Simon, Brian above) but I'm pretty sure that when you log into the admin system after installation, it puts up a big red box telling you to delete the install scripts for (bloody obvious) security reasons... I'm pretty certain that nuking/corrupting the DB doesn't cause the install scripts to magically re-materialise on the server.

I've not much sympathy for people who ignore big red warnings about Bad Things and then complain that the Bad Things happen to them...