Kids are making a mark in the U.K.'s cybersecurity arena, and not in the way their parents want them to. According to the country's Information Commissioner's Office (ICO), students were behind more than half of personal data breaches in schools. In a warning to teachers and educational institutions, the ICO outlined its analysis of 215 data breach reports resulting from security incidents originating from inside schools, finding that 57% of the hacks were pulled off by students.