"...Or are you suggesting that all climbers need education about wilderness etiquette, leave no trace, trail erosion, littering, etc.?"
Ummm, no? My suggestion was that the Gumby's would in most cases find decent, respectful climbers who they would wave hello and maybe stop and chat conversationally; that when they came across the occasional one who didn't get the littering, erosion, etc. thing, that was the one they'd talk to about that topic.
I laid that out in my original post, as you can easily see if you take the time to review.