A student group called Control Your Info has exposed a design flaw in Facebook that lets outsiders claim vacant administrative spots and take over functions in user groups. As reported in FastCompany, the group declined to give their individual names but said they are students from Hyper Island, an advanced education school based in Sweden. To highlight their discovery, they posted messages on hundreds of Facebook group pages announcing that Control Your Info had hijacked their group. Not surprisingly, the move raised the ire of many.  The students claim their goal is simply to show that this major flaw exists in Facebook and that user groups should not leave their administrator spot vacant. Read more at FastCompany.