I have a speech problem. I was teased and tortured constantly for it in grade school. This coupled with having poor control over my temper led to me getting in constant trouble. They also were constantly picking fights with me. Unfortunately for them, you know how some autistic-types can copy something they've seen before, even if they themselves don't know how they did it? I do that with physical stuff. In 3rd or 4th grade I roundhouse kicked a kid without ever having practiced it before. I frequently got in trouble for "hurting" other kids (making them cry) even though they were the ones who provoked me or attacked me in the first place. Grade school was hell. They put me in the self-contained classroom because of my "behavior".
I was home schooled from 6th through 8th grade. High school was a marked improvement. They left me alone more, and I had a lot more self-control. On the couple of instances it did get physical (and never by my choice), I knew just how far to take it to make the other person not want to continue without really hurting them. Most of these bullies aren't very brave. They're a paper tiger. Once they realize they've screwed up and lost control of the situation, or that they've just awoken something totally feral, they get very afraid. The couple people who hit me did it once. And only once. I think a lot of them saw I was hurting, though (I was heavily depressed at the time, and there was no hiding it), and left me alone.
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Heart of the guardian, way of the warden, path of the exile.