I'd say add a troon to counterbalance than but then the groypers might jerk off to it.
There's not much you can do to counter a fandom from starting, but the important thing is to put your foot down on what you, the creator, mean and want. The fans who warp things to their expectations can whine, but that's all they can do. Make shitty fanart, fanfiction, and rants about how the creator(s) is/are dumb for not giving them what they want. Just delete their messages, give attention to good work and interesting questions, and focus on making a good game.
This, mostly. Unless you get blocked by payment processors or fucking croak it, the only one who can cancel you is
yourself. There's dangers in being the lone wolf, and you should still keep people you can trust in on the know, but they should be on the same exact page: Do not interact with troons. Don't even delete their posts. Just pretend they don't exist at all. Do not reference them, do not talk to them, do not allow them into anywhere that matters, like a private group or related administration. Active action should come as a last resort.
The cynical fact is that fandom is
good. It's free advertisement, it gets more eyes on your project and therefore more support. But you should only support the positive and untroonish, or all that which lines your pockets if you're jewish. Advertisement through fanart – porn especially – is powerful whether you like it or not. What do you think an internet degenerate would rather
engage with, a shitty attention-grabbing ad that anyone reasonable mentally edits out, or pages upon pages of big anime titties of julaaaay_(yourprojecthere)? Unfortunately, a significant amount of artists are troonlike, so you can't go dropping your powerlevel all the time. Header size
NIGGER is the nuclear option, and an effective one, but it isn't as powerful as simply shutting the fuck up and not investing in the social media rollercoaster past the initial push.
Our very own
Kiwistation employs the prior nuclear option because it's appropriate. If they cannot handle a repo labelled "slavemaster" for a game where we regularly lynch niggers and pajeets, they won't handle the intended community either. Yet, redditors and others servers complaining about the server is its own free advertisement; even the undesirables are welcome, as they make for productive cows. It does help that everyone actually
is on the same page of calling the troon that asks for female character options what it is: Gaping.