Dark Qiviut

You're still grasping for straws and overthinking the terminology. You don't have to be in a fandom to be a fan nor throw away the specific term for such stupid reasons. A Trekkie is like being a Sonic fan or a brony: a fan of Star Trek.

You're a fan of Star Trek; you're a part of the Trekkie fandom. You're a Trekkie; you're a part of the Star Trek fandom. It's not one or the other. They're synonymous.

Likewise, you're a fan of MLP:FIM...

Likewise, you're a fan of MLP:FIM, so you're a part of the brony fandom. You're a brony, so you're a part of the MLP:FIM fandom.

If you're a fan, you're already involved in the fandom in some capacity. You're just not ACTIVE. Most of the bronies, however, PASSIVELY participate in the community, whether they know it exists or not.

You claim to quit being a brony. You claim you quit being involved in a community that's still actively growing...

You claim to quit being a brony. You claim you quit being involved in a community that's still actively growing and thriving, but ditching the label means you're not a fan, period. And I guarantee you, you don't want that to follow you.