Wow, this thread has it all. Melting glaciers, rising oceans, famine, sexism, parenting instincts yada yada.
It's a public trail. Everyone has the right to use it even if it is above their ability. I stop at the edges of drops and jumps sometimes the first time I ride a double black. I'm sure if some of y'all rode up behind me when I was doing that I would ruin your "strava" (whatever that is...) but if you cop an attitude about me being there or pass in an aggressive way you would get an earful from me (or my wife more likely). It doesn't matter if it is a bunch of kids or an adult stretching their boundaries, have respect for other riders and some humility about yourself.
More importantly than all this though...whatever happened to giving right of way to the uphill rider? In the 90's this was like the 11th commandment. People never thought of breaking this rule. I don't know if it is a BC thing (as I moved out here in early 2000's and noticed the MTB ethos changed) or if it is a rule of conduct that has simply gone the way of the dodo.
More importantly that that is whatever happened to right of way on sidewalks. Vancouver is totally fucked for this. People just don't move over. My wife and I are from Toronto, where people politely move over to their side of the sidewalk and pass each other civilly. My wife and I have done experiments and have literally run into people occupying more than their share of the sidewalk if we refuse to get out of the way. For some reason the other person acts all surprised like "I'm so sorry I hit you, why didn't you move out of my way?". How do you run into someone you are walking towards and be surprised when you hit them when you don't even try to get out of the way?.......the more I think about it, I think people in Vancouver lack manners.
Slow the fuck down when passing people. Have some respect for other trail riders and get your ego in check. And for god's sake, don't scare the shit out of kids trying to learn how to ride trails.