It doesn't require any inside knowledge to manipulate the ranking system. There are some methods that you can't really architect against (like paid posts) from a software angle, so Google has rules and penalties in place to discourage sites from doing that in order to distort their page rank. In this case, one team seems to have accidentally run afoul of those rule and is being penalized appropriately because it makes sense in terms of the larger picture of protecting the quality of search results.