My own experience suggests that bullies dont stop until they are confronted with some of their own medicine. I was constantly bullied by 2 brothers when I was about 10 to the extent that I avoidedwalking down our road as I had to pass their house. One day i just happened to have my cricket bat with me when they started. Suffice to say that they never bullied me again However their parents came to our house to complain that I had "Attacked" their sons. Short shrift given by my mum.