Well, common sense here. The PO is not going to tell the abuser they can go somewhere that they are not allowed to go (i.e. to the victim's residence, etc.) And i'm pretty sure they'd be able to tell who was at the location first and who followed who there afterwards. This is meant to help the victims, not allow them an easier way to get their abusers in trouble. It's just a way of making them feel a bit safer when out and about, or even at home, by themselves.