Nods. I'll find a way to deal with it, one way or another. Thanks for the info.
At minimum I'll follow Tarrant's example and mute it via outbound firewall after initial activation, and leave it at that.
In the case of steam I'm not doing that, though. For me, this is an issue with that initial, forced web registration. It introduces the problem of a third party whom I do not trust or desire services with (steam) storing information which comes from me. That information by its nature will identify me and be traceable, either directly by what I provide at the time, or, through my OS/hardware/IP identifiers. A DRM system would be have no teeth against warezing people if that were not part of the deal.
To make this work the way I would feel comfortable enough with, I would need to obtain a copy of my operating system which does not have my identifying information associated with the install or registration with Microsoft, and, roll a dedicated boot for it on its own drive or maybe dedicated partition if I was being sloppy, and preferably, take some special measures to not source that registration-sort of connection from my usual IP address/network. It may also be necessary to make special email arrangements.
And after all of that is done, I don't know if it's possible to transfer the game's install to my 'real' workstation. I could be stuck with having to roll as a dual boot system. And I don't know if I have to redo parts of the troublesome process if I need to do a re-install from the disk in the future (which of course I keep my disks, I bought the game, didn't I). So, I don't know how far this headache goes or how long it lasts. And then there is the question of patching, all such patches would have to happen on the clean system, preferrably with special IP arrangements, and I don't know the mechanism by which I would effect reversing a patch if it became necessary.
All of this is a whole lot of work and trouble, in particular the separate drive/partition and the seperate OS requirement. My plans to buy NV as soon as it came out aren't solid any more because of what amounts to its elaborate setup requirements. Not owning an extra copy of a microsoft OS is something of a hardship.