I think this is the logical solution after the fact but not always so easy in the heat of the moment when you are trying to present something.

I remember back in the day when I played in a band and we agreed to do a show for a friend who was promoting a party. Everyone was just talking through our whole set and we were having issues with the levels from the sound guy it was just a mess. I was growing more and more frustrated as the set went on. Then with one more song to go I stepped to the mic and said "we have one more song to go, so shut the fuck up for 5 minutes and you can get back to your party".

Grace under pressure is not always the easiest thing.