Do I Sound Dangerous?

I'm an adopted sixteen year old male (born September 30th, 1993; 6:00AM). I was adopted at the age of five, but prior to this, my father ignored me when I asked for his Help in California, when I kept being abused by my babysitter, and teacher, emotionally, but by the sitter both physically, and emotionally. When I was finally adopted by my current parents, I had some issues, and started recieving help. Then My brother (whom I'm unrelated to) came along, and was adopted by my new parents, and joined the family. He was born May 10th, 2000. When that kid came along things changed, and I missed my family. My parents, Don and Kathy paid attention only to my little brother, who had been adopted as a baby. I remember besides my parents just paying attention to Neil alone, my mom was at work from 6:00AM-11:00PM, Everynight, and I barely saw her. My dad basically just spent nearly all of his time watching football games, and baseball games on tv, and I can only remember two occasions, when he actually spent time with me during my childhood. I eventually retreated to my room, and spent all my time up there, after school everyday, after school, all of the time. I felt ignored, so I started separating myself from my family, and began living almost as if I was an adult, sitting alone in restaurants, and spending lots of time in my room, playing video games. Then, on July 4th, 2007, we went to see fireworks at a cliff, and I was totally ignoring it, and just listening to my ipod, my brother kept telling me to look at the fireworks, as did dad, and as did mom. I ignored them, stayed isolated, and just did my own thing, eventually, they got frustrated, and my mom started attacking me verbally, throwing insults, and cursing me out, as we headed home early. For days afterwards, she did the same thing, and said that "Things were gonna change". Almost immediately, she started disciplinning me, and taking stuff away. She said that I would start spending time with the family, and with Neil especially. But we've reached some concensuses in recent years, and it's only a tenth of what it used to be. Although, I'm so used, to doing my own thing, and feeling like no one pays attention to me at home, that when I go off, and do something, my mom starts to cry, and I get scared, because I'm afraid she will start getting destructive again, and try to bring back the old , stricter rules. So I obey, out of fear, and I'm tired of living like this, being afraid that she will do something out of anger, just to make me spend time with the family, and it started when I was seven, I'm just so used to it now! I'v been having violent tendencies towards my new family, I remember, once a couple months ago, I was so tired of the BS that I literally attacked my dad, but he thought I was just playing around, and I injured him kind of bad. I'v been sick of this, being their punching bag, and I want to be the abuser just once! I just want to kill them, and set those b*tches on fire! I always follow the rules, and never did anything wrong, but my mom is pushing me over the edge, like the rest of my family. My grandmother had to give me up, and thats how I got here. I'm sick of being left behind by people.