The solution is not at all straightforward, this whole thing has been a game between blackhat SEOs and google for many years. The spammers make a move, google m

The solution is not at all straightforward, this whole thing has been a game between blackhat SEOs and google for many years. The spammers make a move, google makes a move, spammers respond ad infinitum. The problem is that spammers / extortionists can adapt their techniques much more so than Google can. They care solely about getting paid, they don't care about building a brand, offering a good service or anything else. This allows them a huge degree of flexibility when finding ways to attack their less nimble adversary. They can transition from selling viagra to extortion with ease. If it was straightforward, a company which employs many of the most gifted, technical minds in the world should probably have figured it out by now. Also, it's very unlikely that Pagerank is even in use at all at this point.