Did anyone do anything particularly violent as a child?
Yes, I was occasionally violent when I needed to be. This does not pardon my behavior, but it was done to retaliate against severe bullying that was happening with my classmates. I can't tell you what I did (I don't want a copycat doing these things because of me), except it involved a special weapon or two that I made myself. At the time, my special interests involved learning about extracting natural poisons (and other deadly things). No one died or anything like that, but a few of them did end up with a nasty scar (or two) to remember me by. They had to learn the hard way, as just beating them up lead back to more physical violence against me later on.
I never take my anger out on another person physically. Because for one thing, i'm a pretty small guy and when you hit someone chances are they will hit you back. You can't hit someone unless you're willing to be hit back. 99% of adult men are bigger and probably stronger then I am and the average man outweighs me by 60 pounds and a good portion of men are twice my weight so really the only time I would hit someone is out of self-defense. (Or just run for your life!)
I have taken my anger and frustration out on objects though because I know that objects can't fight back. When I get frustrated, I may kick a wall or something or throw something. But I usually get over it pretty quick; I just have to get my frustration out some way. I kicked and broke a window during my 8th grade year but I wouldn't do something like this again. That costs like 189 bucks to fix and I don't think anyone wants to pay money for vandalizing.
I'm like a ninja if I want to be. I can sneak out of anything while being undetected. I am a master of stealth.