Online sharing a treasure trove for snoops

Social networks offer windows into people's lives, and exploiting those insights is big business -- with some sounding the alarm over the ever-growing intrusion from corporations and governments alike. "There is a thin line of difference between surveillance of individuals and monitoring for research purposes," Gartner analyst Jenny Sussin told AFP. Twitter and Facebook last week revoked data access for an analytics firm which, according to a civil liberties group, helped law enforcement track p