On my local suburban busy trails, I've run a couple of times in a 20-something YO douchebag who is an excellent rider, but who also uses the power of his e-moped to cut his own trails and lines off the well established ones, and whose etiquette towards other riders is non-existent at best. It's quite typical, there are no more than 20 miles of singletrack in this place, and the only ebike riders I encounter are either total newbs (those helmetless are my fav ones), or middle-aged assholes who need to get moar laps in.