i know its totally legal, but it would be interpreted as threatening behavior, or even attempted bodily harm or some such in this bloody country, although i agree that your right to not care about it, i dont, every time i hear a noise in the house i go downstairs with a 20inch long really thick screwdriver that can do some serious damage (or a nice big knife, always got 2 knives within 1m of me at home lol) and i practised throwing it, so i could impale people from 10m away
im sure you wont have such an experience, but we are indeed declining as a society so now is the time to prepare for such scenarios...i think it'd be stupid not to be able to intimidate and defend your home
....one aspect of american society i like!
heh dense rubber balls would be ideal i think, but thats why slingshots are in some ways better, a nice big weighty metal ball would do some serious damage, and anyone would be stupid not to be intimidated by a fully drawn slingshot in their face! so i think personally i'd stick with your slingshot, after all its legal, and if shot in the head with enough power and a weighty projectile you could kill, but theres plenty of other alternatives here so its upto you to see what suits you best
anyway good luck on your home defence and i hope you never in a situation where it becomes necessary, but im glad you'll be ready