Jimmy Carter beat those guys to the punch with the neutron bomb forty years ago. We told the Soviets we were going to stop development, but it remained part of the black budget. We've got neutron bottle rockets that our troops can deploy anywhere they can find bottles, cans, or an old hunk of pipe. We're still experimenting with Neutron Roman Candles. At the moment it's in the "Getting rid of that S.O.B. that mows his lawn at 7 a.m. on a Sunday morning" testing stage.
It worked on the guy across the street, but I don't know how it's going for the other beta-testers? Anyone want a slightly radiated, self propelled push mower? BTW, he mowed his lawn in shorts, dress shoes, and black socks. A timeless suburban style statement. Sometimes he did it with the same footwear and in a bathrobe. Children don't need to be traumatized by a sight like that on the way to church. It was either shoot him or nuke him after he went to the robe option.
There's a man shaped spot in his yard where the grass won't grow, not even the finer hybrid's derived from test plots from Bikini Atoll will take. One thing about landing a direct hit on your subject is they disintegrate on impact. No evidence.