I know this post is about the Linux port, but it does pertain to Doom 3 as well.
I burned a copy of Hexen 2 Portal of Praevus for my friend with Clone Cd. (Before you start calling me a pirater, bear in mind that this game is no longer sold directly through Activision and the only place you can get is second hand ebay\Amazon used copies, etc.-- its abandonware-- the publisher does not make money off of these).
Anyway, putting the Doom 3 load disc in, it said it detected cd copying software and that I had to remove it to continue.
Its not the end of the world, I can live with this, but still pretty interesting nontheless.
Love thy wookie.