Its good news to spammer now they will ready to more work or overtime for their website ranking on Google. Because of Google big panda update which will come this week.
Matt Cuts say their team is ready to battle with spam in 2013. Many search engine optimization agencies uses spam techniques for top ranking in short time. For this they can they are going after large organizations, exposing vulnerabilities and security flaws in sites. Also they use some black hat seo techniques like doorway pages, hidden links, keyword stuffing etc. Also Google found unrelated links on top university website home page links like with anchor text “cheap viagra pills”.
Fore more information and different experts opinion regarding this update you can visit Search Engine Journal