If a system like this had existed for Hannah and her peers, it's more likely that they would have reported, that they would have been believed, and that Mike would have been kicked off campus, gone to jail, or at least gotten the help that he needed.
Se um sistema como este tivesse existido para Hannah e as suas colegas, era mais provável  que fizessem uma denúncia, que tivessem acreditado nelas e que Mike tivesse sido expulso do campus, posto na prisão ou, pelo menos, recebido a ajuda de que precisava.