Kelvin said "somebody is going to end up getting hurt of shot." This is all fun and games to Conor, but it is not to Khabib. If I was on the receiving end of Conor's comments I would not take it as fun. If Conor came up and made a derogatory comment about my wife I would be swinging as I would not car how good he was. I don't understand Conor's actions, since he always commented (pre-Mayweather) about how he was a martial artist.
Even Cris Cyborg is weighing in on this saying that she wished that the UFC held it's athletes to a Code of Conduct.
The problem about a Code of Conduct is that the athletes are not employees but rather independent contractors, because the UFC is trying to skirt the labor law requirements for employees because they want to maximize profits.