You can't possibly mean that. The gladiators fought to the death. Please tell us you aren't really that "libertarian."
I am far more concerned with the destruction of organic (traditional) culture and the social controls it contained by the endless expansion of the therapeutic state than I am a few men risking injury on the grid iron or the arena for that matter. We have reached the point where government has become the enemy of the institutions (family, community, mediating institutions such as churches) that are along with the middle class necessary for the maintenance of our culture form. The root of this is in a philosophy that sees no foreign state or alien quarrel or no part of society that the state doesn't have an interest to protect and enlarge.