About the "except for" feature: Is our believe that is easier for a user to choose which users get to see something rather that to choose from say 500 friends

About the "except for" feature: Is our believe that is easier for a user to choose which users get to see something rather that to choose from say 500 friends which ones do not. More than publicity, we are trying to start a discussion. It helps us create a better service based on valid arguments.