Perhaps some car control laws??
From AP:

Pregnant Woman Killed in LA Brawl

Nov 6, 10:53 PM (ET)
By JEREMIAH MARQUEZ
LOS ANGELES (AP) - A pregnant woman who had just returned from her grandfather's funeral was killed when another woman deliberately rammed her car into a crowd during a street brawl involving about three dozen young women, authorities said.
http://apnews.myway.com/article/20071107/D8SOJEFO1.html

Here is another: http://www.lasvegasnow.com/Global/story.asp?S=7101555
We have to do something about these lax car control laws!