No, my parents don't know I'm a Brony and I'll tell you why; My Mom passed away in 2007, way before MLP:FiM even aired, and I haven't told my dad because it wouldn't mean anything to him anyway so I thought, whats the point. I don't really see my Dad too much anymore anyway but telling him wouldn't bother me, it's not like it's some big Pandora's Box I'm afraid to open, it's just that I guarantee my dad has never heard of the show let alone know what a Brony is So I just don't see that coming up in regular conversation with him.