How about you look at facts before spewing PC-motivated 'guesses', like http://www.thelancet.com/journals/lanpub/article/PIIS2468-26... and http://injuryprevention.bmj.com/content/8/2/111 - both from the first page of my first google search, I'm sure it's trivial to find many more.
DUI is a tough one, people of all socioeconomic backgrounds like to get drunk, and people of all socioeconomic backgrounds like to drive. Off the cuff, I might guess that the numbers would show DUI to be the most egalitarian crime, actually.