While I was googling today, I noticed this site: http://linkpushing.net/ this ensure you to be pushed at the top of the google research's stack, by creating random reference to your sites on random blogs and/or articles. I can't believe that Google doesn't do anything against techniques like this, and I would like to know from someone more able than me on SEO subject if it's really possible to tease the google service in this way. And if you suggest to use this tecnique to my site.
Linkpushing for SEO, real or fake?
google;seo;search engines
FakeE.g. see Link Farms are potentially damaging to your SEO effortsand from Wikipedia:Search engines countered the link farm movement by identifying  specific attributes associated with link farm pages and filtering  those pages from indexing and search results. In some cases, entire  domains were removed from the search engine indexes in order to  prevent them from influencing search results.and from The Register Google whacks link farmsTruthHere's some advice from the horses mouthMake a site with a clear hierarchy and text links. Every page should be reachable from at least one static text link.Offer a sitemap to your users with links that point to the important parts of your site. If the sitemap is larger than 100 or so links, you may want to break the sitemap into separate pages.Create a useful, information-rich site and write pages that clearly and accurately describe your content.Think about the words users would type to find your pages and make sure that your site actually includes those words within it.Try to use text instead of images to display important names, content or links. The Google crawler doesn't recognise text contained in images. If you must use images for textual content, consider using the ALT attribute to include a few words of descriptive text.Make sure that your  elements and ALT attributes are descriptive and accurate.Check for broken links and correct HTML.If you decide to use dynamic pages (i.e. the URL contains a ? character), be aware that not every search engine spider crawls dynamic pages as well as static pages. It helps to keep the parameters short and few in number.Keep the links on a given page to a reasonable number (fewer than 100).Review our image guidelines for best practices on publishing images.Reality CheckGoogle turnover is $5500000000, profit $1480000000.Google's success depends almost entirely on quality (usefulness) of search resultsGoogle can afford to employ the best brains on the planet.Google have the incentive and the resourcess to penalise webmasters who harm Google by devaluing it's search results through fakery, trickery and deviousness.Google have no incentive to make Webmasters need to employ expensive SEO services.Google have every incentive to assist and reward webmasters who have  useful content.