I have learned throughout my life and by watching others in the real world before the WWW took me over. That I used to wear the mask depending on where I was and the occasion. Now it still rings true, to certain degree. I am myself, I am usually the odd ball out so to speak and I am content with who I am. If I had the money I would be even more eccentric, which I have found is who I am. Even when I was younger I almost always felt out of sorts with everyone else. I have mainly family and irl friends on my social media. I don't agree with everything they do. I keep those who are not so judgmental or two faced, I myself have even had ones delete me because I am so outspoken about life.
People who wear masks are not who they truly are, a wolf in sheeps clothing so to speak. As a way to hide their true selves and to be who they wish to be or is expected of them. When it comes to certain types of employment I can see wearing a type of mask.
You can never really know ones intentions when they have the mask on;
1. A ruse to gain someones trust, then come against them or to teach a lesson.
2. To hide who they are because of fear of judgement.
3. Some use it as a way to hide their true feelings. IE: Sadness or Anger.
Use your best knowledge when it comes to knowing they are masking something. Think it through before you react.