Does anybody else find it disturbing that somebody who runs a Bitcoin exchange would run DoS tests on the main bitcoin network?
That seems like behavior that could be reported to his upstream ISP(s). If he was "testing" some little email service provider by trying to fill up all and keep busy of their SMTP server with bogus connections (here I'm talking out my ass, I have no idea if there is any DoS protection with SMTP) I think that'd be against any reasonable ISP's terms of service.
And if he's using a botnet... then what the hell is somebody who runs an exchange doing with a botnet?