By Anita Hamilton, Time, April 14, 2009

Forget the widely unloved redesign. Facebook has committed a greater offense. According to a new study by doctoral candidate Aryn Karpinski of Ohio State University and her co-author Adam Duberstein of Ohio Dominican University, college students who use the 200 million–member social network have significantly lower grade-point averages (GPAs) than those who do not.

http://www.time.com/time/business/article/0,8599,1891111,00.html