POur Process. The procedure
An attack on you or your company's reputation can occur at any time from many directions. People posting on blogs, forums, and websites can hit and run without being held accounted. Even with no validity, a negative posting on a blog or forum can taint a reputation within hours of its initiation, sewing doubt and uncertainty about you or your company's integrity, products, or services.
Countering such things takes experience, skill and SEO knowledge. The best thing would be to counter this when it first happens, if not, it takes a lot of hard work to push it on the lower pages.