This is what I used to shut the mouths of both my anti sisters:
911 Police Immunity
Warren v. District of Columbia (444 A.2d. 1, D.C. Ct. of Ap. 1981)
DC's highest court ruled:
That the police do not have a legal responsibility to provide personal protection to individuals, and absolved the police and the city of any liability.
By a 4-3 decision: The court held that official police personnel and the government employing them are not generally liable to victims of criminal acts for a failure to provide adequate police protection.
This is an excerpt of the case. Have them look up the full case file and read what the girls went through...IN THEIR DORM ROOMS!
There is no "safe" haven from crime.
You may also try the "mother-in-law in trunk" sticker...kidding of course.