If the guy wants to shoot guns that do that, he should get on the bench on the end where the rounds won't interfere with other people or ask the person sitting on the end if they could have that seat due to the nature of the guns.
Also...
I too recently had a bad experience at my range.
The Story:
About 3-4 shooting benches were being occupied and all of us were having a great time, shooting guns and conversing in between shooting bouts.
Then, out of no where we hear this guy yelling at the top of his lungs about 100ft. behind us, coming up the road.....we all looked at each other like...what in the world is that.
Finally, the guy yelling gets up to the range and then tells us all to get off, immediately. He continues to yell and bicker at us, not even giving us a minute to collect our guns, targets, and ammo. He kept urging and urging us to hurry up... like the world was going to end.
Finally, he tells us in an angered voice that the hunter safety students are coming up to the range and that he needed us to get out, and fast, so they could shoot. (Yet they didn't get up there until 20+ minutes later).
Additionally, in one of the other shooter's haste to pick up all his guns and exit the range, he left a single round on the shooting bench and the grumpy guy went ballistic. He said, "WHO LEFT A LIVE ROUND ON THE BENCH!?!?, That is a serious safety hazard!". He then continued to rant on about many other things as we packed up and left the range.
Turns out, this guy was one of the people directing the Hunter Safety Courses, of all people. He had no patience whatsoever and he was the one creating the safety issue making all of us exit the range in such a haste.
I would have totally respected him as a person if he walked up to the range and said something like, "Hey guys, we are gonna have to stop shooting now because we have kids from the hunter safety course coming up to shoot. So pick up you stuff and you can continue to shoot after we are done".
It didn't happen that way and the guy was totally belligerent.
I also checked our club online calendar that is updated frequently beforehand and it said that there was no events for that day, so there was no way for any of us to know about the hunter safety course anyways. It said that the range was open and there was no events posted for that date.
Not to mention, this was my first time going to this range and it was a huge disappointment knowing that I just spent a considerable amount on the membership and had to deal with poor leadership like this.
In the end, the whole situation could have and should have been handled differently. I'm very disappointed to see that someone in a leadership position at the club, especially someone operating the hunter safety course, would act in such a manner. It was completely childish and uncalled for.