I've thru-hiked and "no one" goes by their real names out there (for long). It's just not the way trail community works. There are many people I met and all we know name-wise about each other are our trail names.

I suspect those that didn't want to be on social media at all would have declined to be in the GoPro video for a longer discussion (as I likely would have, but I wouldn't have stopped a passing hiker doing a GoPro recording since that's more in the realm of a dashcam kind of thing). Fellow hikers tend to be respectful about such things.