I'm not 100% up to speed with the working of DRM, but isn't DRM there to prevent people lending out games etc, or is it just against piracy? Either way, practically all games come with a CD key, which you then need to register, once registered it can't be used again. How would you then lend the game to your friend if he/she can't play it because they have no valid CD key? (Again, legally). I can't think of many single player games any more that don't use some sort of online authentication.
Okay, you might not understand why people collect things, but that's you. Other people like to collect things, be it stamps, or Collector's Editions of games. Where did any one claim they were collecting them to sell on ebay? Some people collect just to have it. I have 2/4 of the WoW Collector's Editions, I'd love all 4 (soon 5) on my shelf, even if they stand their 'gathering' dust. I also have collector's editions of other games (Warhammer Online, Starcraft 2, Diablo 3, Guild Wars, Rift, TERA). It's nice to have a collection of collectors editions. And about people buying collectors edition when they're no longer relevant, maybe people would like them for their vanity? Collectors Editions often contain things that you don't use ingame, like a soundtrack, or an artbook. These things will last forever, even when the game is no longer being played. Seems you're being very narrow minded. I personally would like all WoW Collector's Editions to have that accomplishment of having all Collector's Edition of WoW. If you think it's better to invest in gold, you do that, I'll stick to collecting Collector Editions.