Is it wrong to watch fight events like boxing, MMA, judo etc.? From a Buddhist's perspective, is it wrong to watch such sports on television for example? Of course, I'm talking as a lay person. Monks have a completely different approach regarding entertainment. 

Does watching it create any bad Kamma?
In one instance a head of a group of actors asked from Buddha if his profession is a good one and whether he could go to heaven because he provides entertainment. Buddha refused to answer this question three times. But when he insisted on, Buddha's answer was, 


  Any beings who are not devoid of passion to begin with, who are bound by the bond of passion, focus with even more passion on things inspiring passion presented by an actor on stage in the midst of a festival. Any beings who are not devoid of aversion to begin with, who are bound by the bond of aversion, focus with even more aversion on things inspiring aversion presented by an actor on stage in the midst of a festival. Any beings who are not devoid of delusion to begin with, who are bound by the bond of delusion, focus with even more delusion on things inspiring delusion presented by an actor on stage in the midst of a festival. Thus the actor — himself intoxicated &amp; heedless, having made others intoxicated &amp; heedless — with the breakup of the body, after death, is reborn in what is called the hell of laughter. But if he holds such a view as this: 'When an actor on the stage, in the midst of a festival, makes people laugh &amp; gives them delight with his imitation of reality, then with the breakup of the body, after death, he is reborn in the company of the laughing devas,' that is his wrong view. Now, there are two destinations for a person with wrong view, I tell you: either hell or the animal womb.


So I think this applies to such sports as well because they are not devoid of passion, aversion and delusion. So technically, any action or intention with desire, anger and delusion should create bad karma.