I had the safety first ones and I loved them - they have a slider on the bottom of the lock that slides back and forth to keep them from pulling the lever down at all so you can't open it - this would make it so you could technically lock someone from one side but it wiould be the outside - ex the outside of their bedroom - the outside of the pantry - and if it bothered you that much you could keep the sliders on the open / left side when you didn't have to have the locks on and only lock them when you needed to - if heaven forbid anyone did get locked in - which never happened even once you can take the door handle off to get through the door - you have to take them off to put the door locks on anyways - hope this helps
