I would agree. I think 'fan' would apply to at least being into the lore. I'm not especially into the lore of Star Wars beyond what I see on screen. In Star Trek, I like discussing the lore, the "science," etc. I'm definitely a fan.
Yes, but I think "FanDom" implies "Fanatical Domination" meaning someone in The "FanDom" of a certain thing is sexually aroused by dominating other with their fanatical following of said thing.
That's the only explanation I've been able to come up with and I find it hilarious so I'm sticking with it.
How dare you compare me to those low life, good for nothing, disney lovers. We are totally not the same. We might have the same origin, we're called "nerds". But down the road, they took a wrong turn and lost their way. However, I love them like a brother, because there is noone better to pick on than your brother.