There isn't much incentive to keep track of the girls when them showing up right outside of the office has no real influence on if they're about to jump on the glass, and also they can teleport to the windows from apparently anywhere on the map. If they could enter the office without tapping on the glass when they're next door, there'd be more reason to be wary of their audio ques.
Also a little disappointed that the link on the safety poster in your office doesn't lead anywhere at the moment.