Gavin Casalegno attends the Summer I Turned Pretty Season 3 launch event in New York City. (Michael Loccisano/Getty Images)Ahead of Wednesday's episode of The Summer I Turned Pretty, the Prime Video show's official social media accounts are reminding fans of its anti-bullying policy. The reminder was shared as one of the show's stars, Gavin Casalegno, faces increased criticism and online harassment from fans.An Instagram Story posted by the account on Tuesday, Aug. 26, reminded followers of the "community guidelines" for engaging with its content.