A 17-year-old boy in Perth, Australia has been sentenced to 12 months in juvenile detention for pressuring underage girls to perform sexual acts on a webcam and then posting the videos on Facebook, reports the Huffington Post. The boy, unidentified for his age, created a Facebook account under the name of a known student bully, Australian Associated Press reports. He told a 14-year-old girl she would be mobbed and injured at school if she didn’t expose and touch herself in front of a webcam, according to WA Today. The videos were recorded and posted without her knowledge…