please please please epic. dont fall slave to the whole drm thing. protect your IP if you will. but don't let that protection screw over the real customers. as much as you try to stop the pirates.. they are really the only ones who arent troubled by existing DRM technologies.
gamers do not enjoy having their systems invaded by software which affect system performance, install hidden programs, or mess with stability.
so again. just please think twice and choose carefully the kind of technology you use for DRM upon release. (and for all our sakes. dont use drm in your demos!)