Not that I think there aren't governments and other organizations willing to do that, but it has been proven time and again that chemical explosives (e.g. gunpo

Not that I think there aren't governments and other organizations willing to do that, but it has been proven time and again that chemical explosives (e.g. gunpowder) is just hard to beat for killing efficiency. In other words, anyone willing to do that, would probably be willing to just shoot them with a bullet or drop a bomb on them, and that would always be cheaper.