michaelleung: Does that mean the freeware Red Baron I may or may not have is automatically illegal, and I will now be sued?
w0rma: I'm not a lawyer, but my understanding is if you downloaded the game when it was freeware it is legal. If you downloaded the game when it is not freeware - you made illegal action.
Also not a lawyer, but from my reading of copyright law my understanding of the matter is the same. It pretty much comes down to the legality of the distribution at the time you acquired the game. If you got the game when it was freeware then it was legal for whoever who got it from the distribute the game, and hence all is legal with your copy. Got the game from a source/time of distribution that was not legal, and vice verse. Any further distribution of the copy you currently have is an entirely different matter (short version: if it's not currently freeware, don't).
cogadh: I think the GOG guys really need to look into this a bit more closely. Both Red Baron and Red Baron 2, which can be upgraded with a patch to Red Baron 3D, are still available for free in several places on the internet. I'm not talking about pseudo-legal "abandonware" or torrent websites either, these are legitimate sites that still claim that Sierra released the game for free years ago and that free release seems to have never been rescinded.
I'd expect that's more of a matter for the copyright holder to pursue if they are so inclined. As far as I'm aware all GOG has is a license to distribute the game, not ownership of the copyright. In most countries only the actual holder of the copyright (or authorized agents) can pursue violations of said copyright, so unless the copyright holder specifically authorizes GOG to take action on the matter it's simply a matter in which they have no legal standing.