I almost spilled my water over the screen when I read this.
I'm not sure if this has already been stated..but..yes this was actually part of a negative SEO case study from another forum (that's how I got here). I won't say which, but it's there. You've pissed off a lot of people, and I guess you're paying for it.
I'm not condoning their actions but it's a positive affirmation that NEGATIVE SEO is alive and well.
For all you Google product forum "know-it-alls" (you know who you are), I hope you read this one.
I'm seeing negative seo reports JUST LIKE THIS ONE cropping up all over the forums, and I've decided to sit back and eat my popcorn while Google tries to dig itself out of this hole they've gotten themeselves into.