If I might just insert a thought here:
Doesn't the license agreement on the game specifically state that the game itself is actually 'licensed' to you rather than you owning the game itself? As such if you play the game without owning a license to play the game you are breaking the terms of installation and thus breaking the lawfully binding contract?
This is a major bone of contention with many people out there (including myself) who believe that if you purchased a game you have the absolute rights to do with it as you wish, provided you keep it within your own demesne. For example, I personally believe that if I buy the game I should be entitled to install it on my two home PCs and play against my brother when I choose without it stopping me. If he chooses to go home and play it then he should buy his own copy.
It's an argument that has been going on for decades, and yes, I mean decades.
Regardless. The plain and simple fact of the law is that if you download the game and play it without purchasing a license you are breaking the law. Just because you say it isn't illegal because you don't want it to be doesn't mean it isn't illegal. Your computer CAN be seized and you can be prosecuted to the fullest extent of the law.
No-one is ever 'forced' to download a game from a P2P network or Usenet or anywhere else. If you do not like the ways the producers offer the game then you do not buy it, and you do not play it. That way they have to change their methods in the future. Things don't change unless you make them.
On a side note, there is a demo available of Demigod. I downloaded it... legally... and tried it, and I actually think the game is pretty cr*p. So much potential and they make it a no-economy no-talent rushfest. But I digress...
Breaking the law is breaking the law, regardless of how much you want it to not be.