The target does not change the legalities of the action. The state is compelled to investigate and rule. But the punishment is up to their discretion (barring horrid minimum sentencing laws like some jail obsessed countries have). So while they likely will be found guilty, a smart judge will punish them with a pinkie promise not to do it again.
See, when I first heard these girls are going to be charged I was thinking the state was playing the long game. Charge them, and when it comes to the trial have the victims come to testify and then arrest them. After all, it is a staple of a true justice system of being able to face your accuser.