I dont know if starforce is the culprit, but I do know that everytime I tried to play Beyond Divinity, my cd burner died on me and I had to re format the computer to make it work again. This happened three times. I also remember having trouble with Daemon tools while it was installed. It may have been a coincidence, but since then I have not installed anything with starforce, and there hasnt been any similar problems after that.
There has been a few games that I have wanted after this that have had starforce with them and that alone has made me put the games back in the shelves. If Divine Divinity 2, wich I am very much looking foreward to , use starforce, then I will not buy Divinity 2 either.
I prime examle I heard somehwere on developers that took this seriously, is one of the Unreal games that after a wave of angry emails from gamers about the copy protection system, they shipped the game anew without any protection at all. (I dont have any proof if this is true though, it was told to me on a similar forum)
And as many people has said before me: Copy protection harms the buyers more than the pirates. Cracks for games are made most often the same day its released, so for the average game downloader, copy protection have no effect what so ever.
This at least is my thoughts on the subject.