250 grams? Really? That is retarded. I guarantee that limit was settled on not because of the probability of an object of 250 grams falling from some height hurting someone. It was settled on because it's a heavier weight than most of the little quads sold my Walmart, Amazon and the rest and they won't have their golden goose messed with. They estimate a ratio of 20,000,000 (20 million!) flight hours per fatality in UAV. The actual ratio for all aviation in the US for the year 2000 was 1.9 fatalities per 100,000 flight hours (according to good old wikipedia). That makes us almost 400% safer than the other users of the NAS even considering they used an artificially high population density to get the UAS number. More people on the ground have been killed by one full scale plane crashe than have ever been killed by hobby users of the NAS so maybe the FAA should concentrate on that instead if they are so serious about saving lives.