Shortly after she enrolled her 3-year-old son in a prestigious, $21,000-a-year Upper East Side preschool, Rachael Combe, an editor at Elle, received an invitation from the head of the school to come by for a visit. She assumed the meeting was to discuss how her son was adapting to the school’s curriculum.

http://www.nytimes.com/2012/03/27/nyregion/private-schools-mine-parents-data-and-wallets.html?pagewanted=1&_r=1