In this kind of collisions mass is all that counts . Every drone past 500g is dangerous . But what startles me is the loudness around the perceived threat to the passenger aviation (ridiculously small because of redundancies and the small intersection of flight envelopes - and that intersection is in protected and guarded space , at the airports ) and the relative silence from the small recreational aircraft and heli operators . They are flying closer to drones and probably have seen enough to judge them better . My 2 cents - drones are photographing earth objectives , closer means more resolution , there is no point on going past 100m alt . Ofc there will be some nuts breaking the norm , once every a couple of months in all the world but remember that large birds are breaking it daily at hundreds of airports .