Fighting in a cage is optional. Dealing with real life is not.
Also, I'd much rather describe the events in question as "mixed martial arts." It's pretty silly to call any event with a referee "no holds barred."
Fighting is a cage is totally stupid and for the most part creates stupid people. I can't even watch that crap. Aikido is far better than that; We aim to avoid trouble so walking into a cage to fight is about as stupid as you can get.