Go the pet store, get a couple snakes, and put them in her mailbox. If the cops came to my door with a speeding complaint, I'd tell them to come back when they can write me a ticket. Then I'd tell them that I saw that lady driving 200km down your street, and that they need to go over there and talk to her about it. Maybe Canadian cops have more time on their hands, but I've only heard of 2 instances where the cops actually visited someone on a traffic complaint (they know there is nothing they can do about them).