Don't blame them tbh, the buzz I get off the gas and air the ambulance regularly have to give me for my ribs is absolutely amazing. Almost worth the pain..
My little brother was doing 'oxygen' at the last festival he went to
Also this really is not new. When I was at school people would do anything to get high (mind maybe not at 11, 13/14 ish). Some of my mates huffed nail varnish. I tried gas once myself and it did nothing but make my tooth really numb so I don't think I did it right