Dealing with Human Garbage

A friend of mine is a single mother who is unfortunate enough to live in a rough neighbourhood. She has been getting abused rather badly by her neighbours. As one example, they vandalized her car in various ways including denting the car repeatedly down the length of it. The following is a picture to illustrate:

Dents on car door.

She has gone to the police. They stated that she had no proof and that was the end of that.

She’s a student and moving isn’t a feasible option.

This blog post is a call for ideas. Has anyone reading this been in a similar situation? Do you have any advice or suggestions for her? Suffice it to say any ideas are gratefully appreciated.