Fine. You take action as a parent. Police action? Probably not. Just be aware, in my experience, kids get their attitudes from their parents.
I would ask police to charge and put points on her license.
I cycle commute every single day in London. I have had enough of hearing and seeing these type of nasty comments from car drivers. It should be stamped out and car drivers educated that they just cannot go throwing this type of crap around.
The more that are pulled up about it and charged the better.