Amsterdam violated privacy legislation when the city collected the Facebook data of thousands of loitering young people in 2015, NRC reports. According to the newspaper, in 2015 Amsterdam collected over 100 friends lists of young loiterers and performed a network analysis on that data. In total, the lists contained the data of almost 65,000 people. After eliminating people with fewer than six interconnections, a group of over 1,200 people remained. Amsterdam should have reported this analysis to the Dutch Data Protection Authority.