Thought you would enjoy this (old, but still relevant) article about Bay Area parents who have "complicated" feelings about sending their kids to private school.
The money quote:
Other parents told The Chronicle they don't want their children to be around students who wear "saggy pants" or who "curse on Muni [public transit]" or who may be "rotten apples." A few said they can see big differences between public school students and private school students just by watching them walk in and out of their respective schools.[Many reluctantly choose private schools, By Heather Knight, May 31, 2006 ]I’m sure they can!