Which is why you go with anti-matter as your catch. Anyone who can figure out how to acquire and safely carry around an anti-matter weapon was going to ruin your whole day regardless.
As someone whose job it is to maintain and repair machines that make, store and shoot antimatter... Oh, yeah.
Current anti-matter "weapon" technology requires about 5 square miles of "gun", that produces less than billionth of a spoonful of antimatter over the course of a day. The target would have to be coaxed into standing still at the aperture of the gun for minutes, at least, if not hours and would die of acute radiation poisoning from the residual radiation created by the gun long before actual antimatter would give them anything more than the equivalent of a very, very small cigarette burn.