Some advice, please?

So I was driving in my car today, taking my kid to hang out with his friend while I go to class. I look in my rearview mirror and see...is that? It is. It is BD. So I'm driving, and then he pulls up next to me. I give him a weak smile, hoping to just, you know, be able to recof=gnize each other and leave it at that. He responds by shaking his head "no", with ,the face implying an additional "fuck you", making ht emessage: Noway, fuck you, in response to my..smile.... I turn on my blinker to go drop of my kid, and he drops into my lane behind me and follows me there. I try to pretend everything is normal, I'm taking my kid to his childcare, how are you doing? He gets out of his car and asks me "Why the hell am I being shot at?" Now Im not going to repeat the whole conversation here but I basically told him, look, Im sorry if you're being shot at (in the middle of the day, in Davis, CA, nobody else notices, right?), but maybe you should tell the police, I don't know anything about it. So the point is: We have a restraining order against BD because he's mentally unstable, paranoid, a meth addict, and he thinks that I am sending people after him.

Big sigh..start over... I guess there's nothing specific I can ask you all, but this is the situation, Long story short: He's unstable, I'm scared of him, he followed me to my kid's childcare and violated a restraining order and blamed me for all of his imaginary problems, like being "shot at". My friends want me to go report it, and I guess I should, but I feel like such a tool going to the cops when something relatively minor happens. I'm not generally friendly with my local police department, and.. I dunno. The man is crazy, and I guess I should report it so that it's there, and in case he tries to get custody after the order runs out, that I have some of the scary-ish shit that goes on with him on record... But I hate the level that I've brought the state into our lives as it is, with custody before, and with welfare and financial aid applications I feel like my government i all up in my business. But I do want to keep my kid safe. There's really no question here, is there? I should just go be a good girl and do what the lawyer man says- cuz if anything happened to my son, I would be very sorry. So I guess the title of this should be "Thanks for listening," instead.