See, your talking about PC games again.
In the case of PC games, where piracy is so rife it's probably justified. I don't play PC games anymore, but if I did, I'd probably see it as a good thing. If piracy carries on the way it does, then it's just further going to kill the PC Gaming market.
I wasn't aware that Gamestation did PC pre-owned games, but that's probably also a reflection of the fact that I've never looked because the PC gaming section in most shops now either doesn't exist, or is nothing more than a shelf. Of course there is a market for 2nd hand PC Games like anything. But then Game, who is the biggest on the high-street doesn't do them, so they obviously think they don't sell well enough anymore to justify bothering.
The whole reason that they are bringing these measures in, as has been discussed numerous times now, is for the publishers to try to prevent the high-street stores from undercutting them and not sharing the profit.
It may go someway to prevent piracy, but then we don't even know the exact details of what they are doing. Since they have said so far that you can play multiplayer online for a free 7 day trial, I would take that to mean that anyone with a copy of the game can play it and then purchase an online key. Thus if you were playing a rented, 2nd hand copy or even pirated copy, they would still have the ability to access it.