It had previously banned an internet-connected doll called, My Friend Cayla, for similar reasons. Telecoms regulator the Federal Network Agency urged parents who had such watches to destroy them. One expert said the decision could be a "game-changer" for internet-connected devices. "Poorly secured smart devices often allow for privacy invasion. That is really concerning when it comes to kids' GPS tracking watches - the very watches that are supposed to help keep them safe," said Ken Munro, a security expert at Pen Test Partners. "There is a shocking lack of regulation of the 'internet of things', which allows lax manufacturers to sell us dangerously insecure smart products.