but you could take the sign away and imo people would still open the door - simply because that seems to be the only thing they could do. plus with the whole do

but you could take the sign away and imo people would still open the door - simply because that seems to be the only thing they could do. plus with the whole door surface being available, why would you use just your hands? use your shoulder or even back (if you happen to be carrying stuff in both hands)! seems to me like that would be more affordance.