If your opponent doesn't tap and you are forced to crank the submission to the bones breaking point, then you gotta do what you gotta do... It's the other guy's fault for being to stubborn to tap. However, nobody should do it with such arrogance and classlessness as Aoki. If you break a bone, get up and say "you know, i really wish i didn't have to do that"... not "DAMNIT I wanted bone shrapnel to fly into the audience." Very tasteless IMO.
It reminds me of the old mike tyson, where in his post-fight interview talked about how dissapointed he was since he was hoping to jam the guy's nose bones into his brain.