3D Realms just chose the easy way, there are other more positive things to protect your IP. But it's certain that this is THE year. Sounds almost a bad joke now, but it's certain that we will see the final game (note I say "see", no idea about playing it). After all the pressure, tons of nonsayers, problems with publishers, insane developing cycle, I can understand how overprotective they feel, it´s a very important moment for their careers. Maybe in a more relaxed ambient they could have done someting more positive, but I believe this was not the moment.