undeadcow: Granted there are new owners but ID Software has released several public domain source codes and they were an early leader in empowering users to modify their content. The idea the ID Software, and it's handlers, now just prefer DRM enforced product control may be valid now but it's not necessarily consistent with the history of the company. One could even argue that ID Software was a major player in precursory events leading to the DRM free movement with loosened restrictions on earlier benchmark games (like Doom).
It seems like Doom I and II have totally been passed around to every viable outlet known to man (iPhone, diskette, freebies on Xbox, etc, etc) except GOG.
The past is irrelevant. Now that Id answers to Zenimax, there is nothing they can do. A while ago, Doom 3 BFG Edition was released, and despite none of the games included previously requiring online activation, they now do.
tfishell: Which is in some ways pretty funny, because most of the id games I've seen on Steam are DOS titles one can pirate easy as hell if they wanted to. I'm sure if you go to piratebay you'll find all the Doom titles ready to go.
Every game can be pirated easily nowadays. All except constantly online games. As for Doom, you can even play it online as a browser game. Still, all these are quite illegal and I find myself quite surprised that Zenimax hasn't started sending cease and desist letters left and right.