I can't believe in this day and age we allow people to have knives.
Knives have other practical uses besides killing...
Oh, like a say... a gun.

Guns are for killing. Nothing else. Unlike cars, trains, planes, knives, axes and lawnmowers.
So the law should be that you may own things that have practical uses?
I would, in general, prefer a limit on devices whose sole purpose is killing. Art, flowers and pastries don't necessarily have practical uses, but I don't see any serious problems with them.
Just playing devils advocate here.
Then play it well, if you're going to do it at all.
I went shooting this weekend. Put about 100rnds. through each of my assault rifles. But I must be doing it wrong because I didn't kill anything. In fact none of the guns I currently own have ever killed anything. With the exception of my CC weapon, they are for competitive shooting at targets.
I guess one equates guns with killing if you only know about them from crime reports on the news. I grew up shooting with friends and associate guns with fun times and friendly competition. The only "danger" we thought about was tripping and shooting yourself.
As far as practical danger, art should definitely be banned. Art has lead to countless disruptions of the public order. It gives people ideas that can lead to violent change. It is simply not needed.
[/muahahaha]