the french are heavily governed on there giant aircraft everything needs a permit,and every permit can be revoked without cause.
we in the us have no government restrictions on the weight or size of our rc aircraft only airspace restrictions that apply to everything.
here we basically fly as a group (AMA) if you want to fly with them you must comply with there rules otherwise you can do like Tiano is doing set up your own event with your own set of rules and hopefully having enough insurance to cover your assets.
there is nothing stopping any one from building and flying a 3lb or five hundred lb airplane in your own backyard as long as you don't violate faa controlled airspace . the faa does not work against us they recognize the AMA as a self governing body and choose to leave the RC industry unregulated because the AMA does serve a significant roll in the safe use of model airplanes
now who's got the least amount of regulation? it is absolutely the USA .just search around you will find a host of huge scale aircraft in the US
the grass is plenty green right hear you just have to look, Vern