I know I sound like a hippy, but there's just something magical about cairns. If you see one, it's like someone is leaving a message for you. They're saying "Hey, I was here, and this is proof".
I do cairns a bit differently. I don't do them all at once, but one stone at a time each hike. If they get kicked over, I don't care, because I'm just going to rebuild it over time. Also, I don't take selfies in front of them. They already send a message. I don't take selfies in front of every post I make on the internet. That's what this "gravityglue" faggot is doing. It's a girl thing.