The Brookings Institution study examined school-focused discussions on D.C. Urban Moms, a popular online forum. (Bill O'Leary/The Washington Post)

In the D.C. parenting world, the anonymous online forum, D.C. Urban Moms and Dads, has long been known as a ripe-for-lampooning-website for wealthy parents who swap advice on the best strollers, how to raise trilingual children and which schools to send their children to in the District.

But a study released this week, which examined more than a decade of exchanges on the forum, found that it may also have a more detrimental, widespread impact in the city: It helps shape how parents perceive schools that mostly serve students of color and reinforces patterns of segregation in the city.