The risk in this video far outweigh the benefits. It could of easily been a disaster. A wifi signal that interferes, that tripping guy who was flipping you off May have throw his Molly ball at it and brought it down and a plethora of other bad things that could happen. I have seen videos outside a party's where people threw stuff at the quad. You mentioned crossing a road, have you ever noticed the crosswalks, the crossing lights, the laws pertaining to driving the required insurance drivers have, these are all in place to make it safer to cross a road. What safety measures did you take? Did you have insurance to fly indoors at a public venue? Was there a safety plan in place in case of injuries? My guess is no. If you have ever been to a trade show or someplace else they promote them they fly indoors in a net to prevent injury & damages should something go wrong. If we were to take your ideas and apply them to cars do you then see the problem of 'I do what I want, when I want' mentality?
Suck it up, accept what you did was not in the best interest of everyone there and move on. Defending it just makes you look more foolish.