I think you would be at a disadvantage if you were using a sword in a confined area like a small house. A handgun would be far less unwieldy. The intimidation factor is quite high on swords though - sometimes moreso than guns, which is hopefully all you need to resolve most issues. If I were a kid, I'd be awfully tempted to swing around a kick-ass looking sword so I wouldn't consider simply mounting them in a high place as "kid safe". Hell, I'd be tempted to now if I didn't know better than to play with something that I have no training with.