No matter how "seriously" I take my shooting practice (working on aim, firearm operation/muscle memory, trigger and breath control, etc.), I also go there for fun. It's work to make and haul target frames, clear, clean and lug the guns to the truck, grab the correct ammo cans for the day, sort through the gear, drive across the island and back, carry everything to the pistol or rifle area, and maybe have to sign the wait list on a busy day. But once you're on the firing line and start squeezing off rounds, the thrill is there every single time!
If you're in that frame of mind, something as small as flying brass hitting you is just a part of the day. I remember one time on the rifle side, these three yutes (
) were obviously taking turns with one of the group's new rifle. They kept ejecting brass all around and onto my bench. I just picked it up where I could reach, and asked if they wanted it back. They said no, so I threw it in my brass box. It was to the point that some of their brass was landing in my catcher! I asked them to remember how they did that so all their brass would collect itself!
I just thought it was a fun day. No sense in getting mad.
Now, it might be different if the brass-slinger was also trying to collect his brass. At that point, I'd suggest he invest in a brass catcher and explain how that helps him as well as prevents him from annoying others.
People who frequent the range see others using catchers and pick up on why it's useful. Those people will buy one of their own accord. The ones who go shooting every 3-6 months or less won't care enough to spend the money.