I've just read this thread and I'm stunned!

I've decided to post my thoughts about this situation.
As a person who has a lot of experience as a top-manager, I'd like to take a look at the problem from the other point of view.
GMAC is a business. It is a good business: monopoly with intellectual properties that are hard to control from antitrust laws. I suppose that CMAC, as a business, is based on
one general principle: GMAT score must be fair and truly reflect person's knowledge.
Any threats to this principle is a crucial! if GMAT score were unfair then B-schools would seek another criteria for applicants, applicants would not take GMAT and GMAC would be a bankrupt. So, GMAC, as any normal company, must keep its Achilles as save as possible. That is a true reason (ethical reason is rather second one) why GMAC reacts and must react on any attempt to challenge its main principle. The main action of GMAC: do real steps (lawsuits, reduction probability of repetitions) and a large PR campaign directed to make GMAT score as fair as possible in the eyes of its main customers: B-schools.
Expulsion form B-schools. I guess GMAC will carry out some lawsuits and some people, not many, will lost their positions. Preys is needed both GMAC, to clean its reputation, and B-schools, to show that their graduates is a high-quality persons. Why only some people will suffer? Just because effect/costs ratio will be decrease with increase in the number of involved people and lawsuits.
Copyrights. I would like to ask some intelligent people at this site: when a person posts question from bought OG, because he or she want to understand this question deeply, does he or she violate copyrights? I think he or she does... and why is GMAC so reluctant to fight with this situation? I guess the situation does not threaten profit and reputation of GMAC and, to some extent, even increase profit, because people learn more and retake exam. And do not forget about effect/costs ratio....