Worst cuts that "maybe" the fight should have been stopped. And your opinion on when

Debate on Cuts in Fights. My suggestion was that if you don't see bone, you let it go. I was also wondering if their is a culture difference. Say in the US, do they allow fights go on a little to long (most of the time) compared to other countries? Now these are some MMA fights to start Stopped...Yes, No? Yes, No? Result For Boxing, Valero's last fight popped in my head and of course Vitali. I thought Valero's cut was good to go but Vitali's....eh...not sure...although they said they saw bone and that's why they stopped it. And I still think it was his own corner (with the advice from his brother) that ended up stopping the fight more so than anyone else. Of course, Vitali went nuts and was ready to kill the people that tried to stop the fight which was cool. So what's your thoughts on cuts? And do you feel in the States they let fights go on to long?