Yes every team member has stop work authority but it's not to the extent of every unsafe act you see you can stop the whole warehouse. You can stop one person from doing something unsafe, that's just called being safe. Stop work authority is for when you see one or multiple team members doing something that can harm one or all of them if they proceeded doing what they were doing. You stop their work process inform management and the safety infractions that were being observed. Don't go and stop someone a whole process cause someone lifted a pallet wrong or threw a box.