2011 : 75 percent of teens rated social networks ' privacy ratings as ` ` negative '' More than 90 percent of parents polled are concerned that teens know too much . Common Sense Media is the project 's sponsor .
Survey : 75 percent of parents rate social networks ' privacy protections as `` negative '' More than 90 percent of parents polled are concerned that teens share too much . Common Sense Media is the poll 's sponsor .