I have often faced a case where the competitors of my client use SEO blackhat tactics where they contact a SEO company to do link building for their websites and products.

Here is an example of a typical case of a fake blog created only for link building purposes

• A very low content article http://marshallfab.com/fundus-camera-explained.html in obvious fake blog: no author information, partially machine generated text, all blog posts are solely about link building

• Following the link you get to the promoted company page http://www.patternless.com/

• ... which, unsurprisingly, links the SEO company homepage in the footer text http://www.affordableseofl.com/

• ... who are not shy to advertise their Extremely aggressive SEO plan

Does Google have any feedback channel where one could submit cases like this, so that Google would punish the link builders?

Are there any means to bring these blackhat companies to pushame to damage their reputation?