Limiting check-in time for children to certain hours

It would be very helpful if the system would allow us to set check-in times so that people can only check in during our business hours. Our check-in system is in our lobby, and we have parents checking in before childcare hours literally every single day. Our teachers obviously arrive a little early to open the building, put their personal belongings in lockers and set up their classrooms. But as soon as the building is open parents are entering and trying to drop off children before childcare hours have even started. It is also so early in the morning that no support staff is present to guard the door/stop parents. So it would be very helpful to have a way to stop it built into the system.