This is considered a very dak item. This is for stopping anyone from bothering you in any way it needs to be done in order to stop them. We all have heard of turn the other cheek but sometimes for some people it is not enough. Not because they are evil but because what is bothering them or who is bothering them is. We can try to talk to people,try to make friends and there are some that are just insane and maybe the world would be better off teaching them a lesson or in,well,taking them out.
Sometimes it is not a revenge thing or even to get someone to leave you alone,sometimes or maybe in the near future it would be needed.
There can be many situations now or in the future where life could be better. If you think you would ever need this item,get it. We only have one.