The problem with allowing no-CD posts on the forum is we have no way of verifying a poster purchased the game or not, and also info posted on the forum is available to everyone, even those who pirated the game.
Since this is a more philosophical discussion....
Why would that matter? If someone has a hacked version then they probably don't care about a no-CD crack. Also, one could argue, you are already facilitating their enjoyment of the game by all the other things you do w/ this fine website. Do you verify if someone has a legal copy before you allow them to download custom content? To join the forum?
The problem w/ DRM (like requiring a CD to play) is that it only punishes the people who are trying be legal and play by the rules. For example, I'm very worried that if my kids get ahold of my C4W disc again I'll be SOL because they've nearly scratched the living sh** out of it. So, if that happens and I call the publisher to ask for them to swap me discs (I'll send them my disc for a new one so they can verify I'm not a thief) would they do that? Or would they say "control your kids and buy a new game."
So, IMVHO, by banning the discussion and facilitation of no-CDs cracks you're doing a disservice to people who legally own and play the game and those who are illegally playing could care less. The irony is, by banning the discussion from a legit place like this, legitimate owners (like me) are then driven to more illicit sites.
I'd wager the real motivation, and I totally understand this, is that you don't want to jeopardize your special and well-earned relationship with the developers. I'd just admit this upfront. Its much more logical and very understandable given the high level of service and content this website provides to this game and the community.