Let's say you collect stamps. I think it's a stupid and morally irresponsible way of using your free time (you should be socializing or doing sports or learning something new). Just being honest with my opinion.
This is all ok. The problem is when we start firing people or shunning them for stuff we don't like.
This is all ok. The problem is when we start firing people or shunning them for stuff we don't like.