What these companies don't seem to realize is that the pirates always win. You can build it, they will knock it down. Any protection can be cracked. On the PC, it will be cracked and any attempt to prevent that is a waste of time and money.
Also, Silent Hunter 5 (cracked) works fine. It is not an "incomplete version". Ubisoft used what is commonly refered to as 'triggers', gameplay-altering code that kicks in when the protection is removed improperly. A good cracker will find that and remove. That is exactly what occured in this case.
The only thing that legitimatly qualifies it as being incomplete is the non-functional multiplayer, but that is just a way of life when it comes to PC piracy.
Oh, and the lack of the drm. Without that wonderful drm, gamers aren't getting the full experience!