It’s crazy negative SEO exists. An SEO firm tested it by spending just $40 on spam backlinks to one of their own sites. 45,000 comment links for $15. 7,000 double-tiered forum profile links for $5. 4,000 sidebar links for $20. All using exact match anchor text. When the last batch of links hit, the site dropped straight down. Some say this doesn’t work anymore, but many SEOs have seen it happen firsthand. | Edward Sturm