The Sum of Awe
Brought to you by the moment that spacetime began.
In the acts of revenge that you've alluded to, you've deliberately caused someone pain. Can you prove, to the extent that there is no doubt whatsoever, that those people purposely hurt you?
If you can't, you're running a risk of purposely "sharing the pain" someone who hurt you accidentally.
And if you can prove it, why not just turn the evidence over to the police and let them handle it?
It's a difficult situation at best when people can't prove someone did something, and those situations do come up, and as a practitioner of revenge I've come across this situation. There's a saying - Don't just point fingers and assume things. Usually not all things need revenge, some people have really low tolerance. There's gotta be a limit.
The question isn't why shouldn't I turn the evidence into the police, the question is why should I?
You think there's fairness in revenge?
Certain examples of revenge - If someone punches me, what kind of fairness is it to let them go care free? If someone steals money from me, what kind of fairness is it to let them go while you, the good guy, lost money, and them, they bad guy, got more money?
Explain the fairness in the following scenario:
The teenager down the street deliberately sets fire to your house, and burns it to the ground. What do you do in order to "share the pain", "get even", get "a kind of fairness", or get "equality" with this teenager.
Make the teenager pay the price of the house and everything in it.
I'm guessing that you'd burn his house to the ground.
Don't just guess
You're lying to yourself.
Here's a real-world scenario:
My grandparents were murdered by two robbers who were trying to break into their apartment. While it wasn't premeditated, it was deliberate.
If you were in my shoes, it sounds like you'd shoot them and take pleasure in getting even ... and that's purely selfish.
How is it selfish? I bet they don't even feel bad, so it is fair to make them feel the balance of pain.
And if you think the extended family gets equal pleasure from you shooting the robbers, then you should get sufficient pleasure in letting the law take care of getting justice. (In reality, punishing/killing the guilty doesn't allow anyone to feel at ease. Real closure comes from within.)
Personal relationships do not extend into the matters of extended family. It's only the relationship between you and the person talking to you. If they hurt you bad enough, why not hurt them for equality? If they kiss you? Well... get'em a thank you note or kiss them back!
At least I.S.L.A.M617 is willing to admit that he's just seeking his own self-gratification. As monstrous as it is, his belief is internally consistent, while yours requires that you lie to yourself about your own motives, the impact of your actions, the feelings of those around you...
If you believe that I only do it out of self gratification and view me as a monster, then I don't wish to participate with someone who holds such a negative view of me. Every time I have taken revenge, which is a very rare occasion, I always think about getting even, not about them feeling pain. In fact, some of the times I felt bad for getting back at them, but in my head I know it's fair.
Of course, if I was living in a lawless society and had I.S.L.A.M617 as a brother, I'd put him down like a rabid dog, purely as an act of self-preservation before he got us all killed in a sick blood feud. He clearly puts his own self-gratification over anybody else's well-being, including his family's. In a lawless society where community is everything, that attitude is a liability to anybody close to him.
That's disturbing to hear.
In a modern society, I'd tip I.S.L.A.M617 off to the police. When he got out of prison, I'd kill him in self-defense before he could get revenge against me for sending him to prison. There wouldn't be any pleasure or gratification in it. Just painful necessity.
You're assuming that he's going to hurt you just because of his opinions, that does not count as self-defense.
Also, did I ever say I had a problem with self defense?