Shades of SEO spam

Spamming intends to mislead search engines indexing programs and generate an artificially high ranking of web pages. This BMW case has become high profile for a major offense and is likely to gain attention for another couple of months. They exploited the supremacy of search engine with a view that promoting the business using unethical SEO techniques is an online business imperative. They used "borderline" techniques to gain rankings, and their traffic dropped like a rock. They took care of every impossible situation, buried keywords “gebrauchtwagen” (used car) and “neuwagen” (new car) many tens of times, relied on javascript code and CSS spamming to trick Google. They fed the search engine spider with a page full of their important keywords mentioned above without even realizing once that Google is smart enough and is strictly against the black hat SEO tactics.
BMW created a doorway page that featured “gebrauchtwagen” 42 times. In addition, a user’s browser immediately generated a JavaScript redirect to a completely different URL to the one seen by Google’s spider. This ‘cloaking’ technique broke one of Google’s fundamental rules. Search engine spiders ignored javascript totally in the past, probably because of this reason BMW endeavored to cover the real pages as best they can. The javascript they followed more or less looked like:

Because JavaScript is interpreted, loosely-typed, and has varying implementations Google immediately recognized the loopholes and demoted bmw.com.de for artificially enhancing its popularity. Though BMW Germany promptly removed the offending pages from their site, 2 hours after realizing what has happened, but it was obviously too late. It will be a minimum of 30 days that the BMW site will not appear in the Google results for any search. Rest depends on Google’s terms and conditions how long it keeps the site on probation.

The code for their CSS spamming was: