No I don't think it was directed at me personally, it's just some German-language spammer that used one of my domains as a return email but hooo-boooy did they ever use it. I've never seen this many bounced mails in my life before! (and I've had it happen before)
Yeah, there's not much to be done. Sometimes I think of setting up PGP and such, but then I imagine trying to explain to my mom that she needs to go to this hippie web site and install some extra software just to read email from me, and I abandon the idea.