I own a few. I use it for home protection and they're also a hobby. I've been learning some gunsmithing and have built/pieced together a few guns. Shooting them is fun too
I understand it's not everyone's cup of tea and I know there are some holes to the whole Libertarian argument (let me do my thing and you do yours) since these tools can be used for some pretty nasty acts, but the same could be said for vehicles.