How Will Steam on GNU/Linux Affect Software Freedom?

rms has published his thoughts on Steam coming to GNU/Linux. He notes that the availability of proprietary games may very well help spread GNU/Linux (but the FSF prioritizes spreading software freedom). And, you're better off at least having a Free operating system instead of Windows: "My guess is that the direct good effect will be bigger than the direct harm. But there is also an indirect effect: what does the use of these games teach people in our community? Any GNU/Linux distro that comes with software to offer these games will teach users that the point is not freedom. Nonfree software in GNU/Linux distros already works against the goal of freedom. Adding these games to a distro would augment that effect." Or: How will the FOSS community affect Valve? Already they've contributed a bit to the graphics stack, hired a few folks from inside the community, etc. But Steam also makes use of DRM and distributes software in ways that are opposed to the ideals of many in the FOSS community (and even the wider Free Culture community). Given Gabe Newell's professed love for openness, might we see their company culture infiltrated?

perhaps RMS is forgetting

[FranTaylor]

that emacs and gcc were written on HPUX systems

what's the "lesson" to be learned from these programs?