Actually, the potential for injury is much higher in sports like football. Most of the injuries sustained in martial arts are superficial ones, simple cuts and bruises. Sure, you could tear someone's shoulder with a kimura, but not many people are enough of a heartless bastard to ignore a tap.
I think it's stupid that since I'm not some super honorable kung-fu philosopher, I'm suddenly just some dude that thinks he's ultra tough and has circlejerks with other ultra tough dudes. I'm still a student of the sport and still have much to learn, but I'm realistic about it. This discussion makes me think you watched The Karate Kid and all of a sudden know what martial arts are about.
I have probably done martial arts for longer than you have and I don't even do it anymore.
Kids like you are the reason that so many people look down on MMA fighters. A buddy of mine, one of the best MMA fighters around hated it. He would never ever get into a fight unless he was provoked, he would treat everyone with respect and didn't even talk about how he fights or whatever. When people like you came around he would be extremely disappointed. People that think MMA has nothing to do with honour. and that humiliating your opponent is acceptable.
But it's okay I guess, there are thousands and thousands more people like you who think MMA is just something cool.