Like many other things (quads, motor bikes, snowmobiles, etc.) the idiots that use them without regard for anything reasonable, or sensible, or consideration of others, will create a situation where they will get regulated to the point where most of the fun is gone. Rules don't get made for reasonable people; they get made because of idiots proving that rules are necessary. The explosion of drone technology and its consequent abuse will very soon mean that the regulators will have to get involved.