If they could sign Darko for the vet minimum, there would be no downside. Perhaps KG could bring out the nasty side that he was reported to have when he was drafted, but has yet to show up in the NBA...or he will just make him turtle, and they will cut him.
If its for the Bi annual exception, then its a little more risky. But I still like it. I have a thing for skilled big men who can block shots. He may not be as skilled as was once thought, but he is decent. And as a backup/third string, it is a nice thing to have.