Thanks for the view and insight. I remember growing up old folks complained about skateboards on sidewalks, then roller blades, etc. When they finally got it and cities and states started building facilities, suddenly no more problem. Agree with the narrator that giving space to do this could be good but I think part of it being cool/attractive to attendees is the illicitness, though that's just conjecture. Probably the fact that it's social and free is a big deal and helps attendees since the US has deliberately eliminated those spaces.