Our legal system only allows people to be convicted of crimes if they are proven guilty. We don't have cameras watching everyone every minute of the day, so sometimes a crime can be committed without it being possible to prove the person who committed it guilty. So we protect the identity of rape victims even if their attackers escape punishment because the crime can't be proven to have happened - because that, rather than a false accusation, is what has happened in the overwhelming majority of the cases. Innocent women should not be labelled as unchaste because the legal system let them down.