E.g. in germany it is not allowed to fly over private property with a drone (equipped with a camera), no matter the height. You have to stay above offical streets. And maximum flight hight is 120 m, if I remember correctly.
I guess it's EU law, so it should be simmilar in other EU countries.
In Germany you are only allowed to shoot your pulse laser with 24 giga-watt max. I guess it's an EU law, so should be the same for all of europe.