I think there's some major differences with the ID analogy overall. This isn't drinking. I'm not handling controlled substances that are illegal to distribute to minors. I'm playing a video game.
It's closer to being put on parole. For being a customer.
I'm come to accept CD-keys easily. I could probably come up with a ridiculous analogy there. But I don't feel the need to. What I do feel the need to be offended by is the potential lack of control we're allowed over things we purchase. In the US, if they shut down their authentication servers, I no longer have a legal right to play the game I purchased. It's essentially saying that we no longer have right to the media that contributes to our culture.
It's like, at Disney's whim, you can no longer tell your children about Snow White, Cinderella, or Peter Pan. You could never show them that movie. They our elements of our culture. What if nobody was allowed to listen to The Beatles again. Or an Elvis album. Legally, anyway. That's quite literally what that is. Music, movies, books, and TV shows have defined generations and culture. Games can do so, too. The Library of Congress recognizes this. They want to start cataloging games. Forcing us to check-in with the publisher for approval to operate these games will prevent that chance of passing on and preserving these things.
That's more my contempt for the DMCA combined with this, of course.
I can only hope that one day a "culture-preservation" law will be enacted. Something that ensures we can preserve these things indefinitely.