And it seemed like a reasonably honorable fight to me. He didn't sucker punch him - far from it. They agreed to terms of a contest. They met, fought, and stopped when the ref declared a winner.

Did he embarass the other man? Maybe, but the other man stepped up and did his best. Good for them both.

The MMA fighter wanted to stop what he considers fraudsters. Good for him! You don't get to have your feelings spared just because you invent some sense of honor which you think others must adhere to. Turn down the offer to spar if you think the outcome won't be to your liking.