its probally more to that fact that you are assuming that they have no clearance to conduct parachute ops including object jettison in that area which is clearly a rural area, the DZ has to be templated and airspace surrounding cleared, this includes the project trajectory (based upon flight characteristics and wind) of any known item to be jettisoned during flight, i couldnt give a rats ass if it is a doona or a warm cosy winter flannelette sheet of his mummy's bed he uses, i just find some peoples reactions very predictable in these forums based upon current fads, i can just imagine the change of reactions and comments if the guy happended to be Ruben Lenten flying a slingshot of that balloon, i suspect actually i would put my nuts on it that the comments would all be supportive, even though he (Lenten) has been the one to post stupid acts on video flying kites in urban areas more so bringing disripute onto the sport, (but wait we will all now assume he had clearance to do such acts and that he is just "promoting" the sport and all the streets were cleared of innocent people who could have got their heads cutt off)
Clearly dont you think that any advertising rep or company exec. would have considered the fact of a stray board chopping little daisy's head off, hence why the stunt appears to have been performed in a rural area not on the beaches somewhere in LA, where "promtional value" would have been alot more, its just very predictable that when some who has less that 500 posts against their name posts something of interest to them on this site and who honestly thought it was "new" people shoot them down in a ball of flames in true aussie tall poppy syndrome, not all people choose to waste their lives by attempting to be the biggest posters on this site and some of the most experienced, respected & disciplined kiters out there who have been around for years have a handfull of posts or dont even bother with the site because of the crap some people go on with, im just presenting an argument based upon a few years of observations.