You can always ignore the people who challenge you to DA.  Weirdly I don't recall ever being called out in the MA to take it to the DA to settle anything.   If that ever happened I'd say 'no thanks I don't care'.   To me its' value is as a practice arena not as a way to measure your manhood, because doing that by flying a pretend plane better than somebody else is so very sad.   I measure my manhood the old-fashioned way...with a yardstick.