I don't necessarily believe that consumers should have the rights to second hand sales of digital games, however I also don't think any storefront should have the right to treat its store as a separate platform (i.e. requiring games to be ran only through their unique client). No store should be able to legally alter game files like that unless the developers designed it that way intentionally (i.e. Steamworks). This is unrealistic, but how shitty would it be if buying a game from a brick and mortar store required that you be in that store in order to play your game, lol.
But, if Steam did have to allow second hand sales, or at least some type of trade in deal, I can't say that I wouldn't be at least a little bit pleased. Probably half of my Steam titles are games that I bought impulsively during sales, thinking that I'd want to play them later on. Well, later on came and went, and those games I am no long interested in playing. As an example, the Dawn of War franchise. Dawn of War is cool as hell, so I figured I'd check them out. Before I even got a chance to play them, I realized that I no longer enjoyed RTS's. Actually, I can't stand RTS's now. Not really sure what caused that to change, but I definitely prefer turn-based. I wish that were the only example, but I have about 200 more =/
The blow is softened of course by the fact that I picked most of them up dirt cheap during sales, but still, cheap x 200+ ain't exactly nothin'. They were anywhere from probably $3 something to $30, so I'm sure it's still $1000+ worth of software I'll never use. Would be nice to have options.
And just in case anyone feels like chiming in with something like "You shouldn't have bought them, stupid idiot shit!" A) At the time, I wasn't expecting my tastes in gaming to change so drastically; and B) If I had overpurchased on literally just about any other good in the world, I'd be able to return or at least resell those prodcuts. And keep in mind -- I'm not saying I think Steam is obligated to make this change, only that I wouldn't mind if they did.