Don’t do it, and don’t even think about it doing it. If you are taking care of your own SEO or have hired a company or individual to take care of your SEO Campaign, it is still your responsibilty to ensure you or your hired gun are only using “white hat SEO”. You do not want to mistakingly or knowningly take part of such a scheme…ever.
Blackhat SEO is basically trying to decieve or trick any search engine spider by means of hidden text, spam, deceptive cloaking, or doorway pages that comprise results and taint the SERPs for everyone. All major search engines investigate these cases, and 99% of the time you’re site will get banned from one, then the others will soon be following suit.
Once you’ve been banned, your site gets removed form the search indexes, and your organic traffic will go with it. If you’re running a advertising such as Adsense you’re most likely going to lose all your revenue from that source as well.
There are tons of ways to get caught up in blackhat seo methods, such as keyword spamming, cloaking a site, having meta tag spam, or abusing redirects are just a few. We’ll cover more at a later date, but for now we encourage you to do some of your own research about what black hat seo is, and avoid it at all costs !