Back in School I would use violence cos I hated my mates saying anything bad about me when I had enough shit from bullies. Its a bad habit to get into. I eventualy decided I didnt wanna use force anymore, I was really depressed and lost the will to be in control. The result was the emergence of years of resentment I had created in certain "friends" of mine. Needless to say my last year of school was a mess (not all my doing though).
My point, is violence is a short term solution to a long term problem. These days I prevent people giving me shit through an indirect force of will. People pick on you because your socially weak, when physical strength only deals with the moment at hand, without solving the long term-problem of your social weakness. Make yourself socially strong. Use force in moderation, only in situations where you truely cannot let something pass.
I hope you find my advice helpful.