Reality,
I'm going to introduce you to a new concept. It's called PERSPECTIVE. I know, it's an awfully long word, three whole syllables, but I think you'll find this a useful thing. It means that the point from which you consider something has a direct impact on what you see.
If someone did that to my kid - possibly even to a friend's kid - YES, I would kill the person. The law, in my eyes, provides inadequate punishment for those who sexually abuse children. And when it affects ME, I'm going to see that "adequate" punishment is given.
And then, I'm going to have to step in front of a jury of my peers. And were I sitting on that jury, I'd convict me of murder in the first degree, and find in favor of the death penalty.
Why? Because as the parent, I don't care about the law. I want to see PUNISHMENT administered - appropriate punishment. But as the juror, I *DO* care about the law, and realize that while I UNDERSTAND the action of the parent, and might even do it myself, I recognize that the law has its standards for dealing with crime, and that the parent committed the crime of murder in the first degree. "What would you have done?" is NOT a defense. "What would you have done?" is a question that needs to be addressed by the legislature, not the judiciary.
If you take the action out of the extreme and put it into the ordinary, you'll see that we make these "judgement calls" every day. For example:
I'm driving 70 mph in a 50 mph zone. The cops pull me over, and they give me a ticket.
Now - consider that the reason I'm doing it is to get to the hospital to witness the birth of my child. How would I describe getting that ticket? I don't know about you, but I'd say, "It was worth it."
But to be fair to everyone, the law cannot draw such distinctions. Whether it's me getting to the birth of my child, the teenager getting to his date, the businessman wanting to get to a deal, or a concert-goer who wants to get the best seats, the law has to look at each of those situations as the same.
As for this guy who killed the child molesters? He killed them. He says he killed them. He says he's got a reason for killing them. But the law says he doesn't.
So, in answer to your question, Reality, if I were to take the law into my own hands - even knowing that that's what I'd do - YES, if I were to do that, I'd belong on death row.