Sharingan is the Devil's Weapon (o_0)
As we've seen in the latest chapter, Kakashi killed Rin and had no remorse (like seriously his entire arm went thru her). His lust for power after getting the sharingan took over him, probably unconsciously and he probably wouldn't remember (like a drug addict). Therefore, I wont blame Kakashi, it's that evil as eye causing ppl to just kill off anyone close to them!! Even those who weren't born a Uchiha was more than willing to kill whoever to get their hands in it.
I bet Itachi really killed Shishi for his eyes and gave the other to Danzo, I still can't see Danzo taking it himself -_-