I spilt from my ex when our son was 1 1/2, he's now 9. My ex was abusive, I did press charges but they said there wasn't enough evidence to convict, so he got way with it. I've moved on, and been in a relationship for nearly 8 years and have two more sons. My ex has contact with his son which includes every other weekend and Tuesday after school, so apart from these times he has no reason to be near the school where all three of my children attend. But my ex keeps riding his motorbike past me and my children, when we are walking back from school, and If he doesn't see us the first time he goes past he goes past again and again till he does. And revs his engine which makes my youngest jump. I have asked him to stop doing it, but he just laughs and says he will do what he wants. Really don't know what to do or if there is anything I can do.