This is true, there is very little stopping someone strapping a grenade to an off the shelf drone and flying it into a crowd, other than regulation on the explo

This is true, there is very little stopping someone strapping a grenade to an off the shelf drone and flying it into a crowd, other than regulation on the explosives themselves, but that's not something that can easily be mass produced. Anyone with enough skill and determination can produce a weapon by themselves, I just think mass production makes it far easier for ill-willed people to obtain a ready-to-go weapon. I still think the bigger risk, currently, is from the people buying these legitimately. These are not much more than precision bombs in their current state, and the risk is not from terrorism but war, and specifically how close to home that war can get. When the Salisbury poisonings happened it scared a lot of people, so imagine the panic if something like this was used to attack a van or a small building in a populated area.