Actually that is part of reason I brought up the subject of people uploading stuff. The vast majority of people who get caught, and sued are people who upload. Its true that it is really not worth the effort to sue someone who downloaded a game. However it is worth it to sue someone who uploaded a game that a 1000 people then downloaded. Since you can sue them for 1000 times the price of what you sell.

As for it being practical to put things like codes on the back of CDs and stuff, I am sure it is very practical. Even if there are ways around it, it probably stops a bunch of people. Not every one is that motivated, or capable of finding code breaking software that actually works.