A former teacher from Knox Grammar School in Sydney has avoided jail after being convicted of attempting to groom a person believed to be a minor through online messages. William Roberto Gulson was sentenced to a three-year Community Correction Order, including 400 hours of community service, and will remain on the NSW Child Protection Register for eight years. The court heard Gulson exchanged inappropriate and explicit online messages with a dating app profile claiming to belong to a 15-year-old boy, although the account was later revealed to have been created as part of an online vigilante operation. The sentencing judge rejected defence arguments that Gulson posed a low risk to children and recorded a formal conviction.