This is very relevant to my interests. Please keep this updated!
IMO "crap is gonna really hit the fan" within a few weeks-months regarding "negative SEO".
Some of the things we are seeing on our end are pretty ridiculous AND scary. I'm honestly expecting some type of "update/mention" from G about this in the near future, because what we and others are reporting and seeing is not looking good...
I agree with linkbuildr regarding attracting natural links like that though if you can.