Having worked on DRM, I can say that it’s far from perfect and most people who work on it are aware of the fact. The state of the technology is such that it is an attempt to keep the honest people honest. These people who posted the keys are unimpressive within the world of hacking.
That is a worthy goal - but the better way to achieve it is with fair licensing and pricing practices. The current strategy of the entertainment cartel is to keep prices high with an artificial shortage of content via DRM and bad legislation. That strategy is failing. They should adjust their prices, eliminate DRM and make it up on volume.