Allow people to download Steam themselves for the community / easy access to games, if that's what they want, but don't confuse it with DRM.And if they didn't use Steam, which probably is the best form of DRM there is since it actually gives you benefits with a community, easy access to games etc, they'd use some other form of DRM. It wouldn't be a Stardock esque DRM free title.
As the examples in the last couple of pages of this thread show, Steam DRM is far too restrictive. It's nonsense when two people in the same household can't both play the game and have their own high scores / achievements. The way this is going, they'll be calling us "pirates" if you have two people sitting together at a desk playing the game... or for looking over the shoulder of someone who's playing it. Obviously this is hyperbole but there have to be limits to how restrictive you are.
I don't buy that many PC games but the system they had for Crysis Warhead seemed pretty good. You had a code which you had to register via the internet, which allowed you up to 5 installations. You could un-register an installation at any time. Problem solved. Not intrusive at all. I'm no expert on DRM but this seemed a lot better from a user standpoint.