Would you rather have him in a position to make new law of his own desire, or to enforce law of someone else's desire?
He is the prime driving force behind the intellectual property rights initiatives that trouble you. Wouldn't you rather have him gone before he accomplishes his goals in this respect?
You make a good point, that he would be out of the senate before he mangaes to get his legislation passed. But I am also worried about how he would enforce current laws as attorney general. I think the situation we have currently with the movie/music industry suing teenagers, is pretty unacceptable.