Every time this issue comes up, it has the same polarization of evil/ not evil. However, to play devil's advocate..
Lets agree that guns are evil because of the harm they can cause. Ban them. Ban sharp knives. They can kill, therefore they are evil.
Logically, we must also ban alcohol, and cigarettes, as they also kill.
Cars kill too, perhaps we should also ban them? We could go on and on with this line of simplistic argument. Regardless of the circumstance, these are merely objects. Incapable of doing any harm of their own accord. I The problem is the people using and abusing the objects. Good and evil reside in people, not objects.