DL would be putting a lot of people at risk if he was taking hikes barefoot. The odds of having some kind of foot accident are extremely high. Twisted ankle, bee sting, puncture wound, snake bite, fall, trip, foot fatigue.... If DL hiked like that and had a problem, he would require help with exiting the trail, including perhaps SAR and LE. This takes MANY people and puts them all at risk.
Consider this: If you can't hike out, you have to be carried or airlifted. And if you're 150 lbs? How many people does that involve, just to do the lifting, and then to swap out as folks get tired? Consider the expense of all that, too. How many personnel does it take to get a helicopter off the ground, find a good landing spot, train the skills necessary to winch someone up....?
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Experience tip: NEVER hike barefoot. NEVER go hanging out barefoot in the backcountry. Even water is a safe place because there can be unseen obstacles and you have no grip. That's why kayakers and rafters wear water shoes. Same with canyoneers. Just don't.
Bottom line: when in the backcountry, do whatever you can to keep from creating a risk for others; that means fellow hikers and SAR. That means good footwear, water, emergency stuff, appropriate apparel.
IMO if someone is out there who has chosen to do something dangerous (like wearing no shoes or taking selfies on cliff edges), get as far away from them as you can, because they are threatening your safety.