I wonder about additional fencing. In Yosemite, they have in some cases gone the other direction, removing old railings on some of the more remote vistas. It is not clear what the motivation was. Either they were concerned about deterioration (some were quite old metal railings), they considered them an instrusion on the wilderness experience, or felt that they inspired even more foolish behavior.
But the choice of shoes in many parks seems quite "accidental" if you pardon the pun. As I mentioned, in my own case, I discovered how slick leather soles were on pine needles. But even then, the footwear of choice in many cultures (ie. the high fashion of Brazil) leads some to wear what they comfortably don in urban situations into some more challenging terrain.
I was enroute to Vernal Fall with a journalist once, discussing just that. We'd stopped to catch our breath on the final ascent of the 700 wet granite steps adjacent to the fall. I was describing the amazing things you encounter on the trail, such as women in spike heels. He laughed at my assertion. Impossible!
Moments later, we witnessed a very attractive woman in spike heels making her way down toward us on those tall, wet, slippery granite steps. How she made it up the steps is a mystery, though I am guessing she was quite comfortable in those spaghetti strap spiked numbers. Coming down, she chose to err on the side of caution, sliding on her rump in skin tight white pants, from step to step. The journalist was dumbfounded.
