I'll defend it never as a sport.
however, these dolts all sign on for it, so if they get hurt, I shed no tear.
And it's fun to watch them kill each other, because, well because they are idiots.
I know there's skill, definately there is. However, it seems any martial arts person you ask, will line up to tell you it's all about "SELF DEFENCE"
If thats the case, the best one of the lot is the one that concedes his fight before it begins.