Wearing a mask can make you act like someone your not. You see it everyday in school when someone cusses or says something inappropriate you know they are probably not going to say that in front of their parents or guardian. Some people act totally bad with some people but are wusses with others. Masks allow you to be some one who you would normally not be.
Masks do affect the idea of inherent goodness because you can be born bad but act good even though your not. People can be born good and act good most of the time but some times they can put on a mask that is totally the opposite. That's why you never really know who's good and how's bad.