If they follow thru with these DRM Gamestop's stocks and profits will plummet. They will have no choice but to close because GStop is assuredly only opporating on sales made from used product.They are already projecting closures. They can threaten to not sell their consoles anymore, i doubt it tho. Stores like Walmart will gladly pick up the slack from them. No one really likes GS as  a company, and simply tolerate them due to their good pricing on new products(that are used usually). When they no longer support 2 of the biggest contenders in the industry, consumers will leave.

What I mean is GStop wont have much of a choice, either do it or go under. 

Courts in europe are gonna tear Sony and Microsoft appart if they do this anyways.

I am essentially in favor of the 2nd hand market, but that is a compromise i would be willing to do. I dont see the point of buying a game used 5 to 10 euros cheaper. When that is the case i always go for the original copy.