I'm pretty familiar with the DMCA and I'm not 100% sure that I could keep it straight with the prospect of my personal and professional reputation crashing down around me because of some jackass illegally cracking into an account I owned and blasting out personal data.
Since we're obviously talking about a very determined scumbag, it'd be too easy to just host outside the US. Copyright law often does apply in this kind of situation, but it's still not a great solution. Need more attention to privacy rights.
Would it be to much trouble for these people to learn how to use the DMCA properly? Obviously he is not going to turn his own web site off.