I've been waiting until after Christmas day to make this post, but some of our communities recently have had a lot of noise and upset over someone that uses neopronouns that most people are unfamiliar with.
So I want to make this clear. A persons pronouns are to be respected. This is true when the user is using neopronouns that you're unfamiliar with. It's true even if you think someone is trolling. Pronouns are not rewards for good behaviour. They aren't only to be respected when you like the person you're interacting with, or if their pronouns "make sense" to you. Trolls, spammers, twitter users, it doesn't matter who they are, your options are to respect their pronouns, or to not engage with them.
I really want to re-iterate the importance of this. Gender diverse folk are undermined, invalidated and questioned at every step of our lives. As a community, we need to be working to undo that, not creating more of it, and that means there is no space for treating pronouns (including neopronouns) as a reward for good behaviour.
This isn't a free reign for trolls and spammers. The rules still apply. Trolling, spamming, etc will continue to be dealt with, but it's not an excuse to act as if respecting someones pronouns is optional.
It sure is trainable to some extent. I didn't think I suffered from gender dysphoria when I first realised I was trans. I was only able to connect with gender euphoria to realise My identity. But after I experimented with My gender and tried on some new pronouns and self-images, I realised I hated being a male. I was miserable, but I wasn't able to see My misery, because I thought it was just life. It's like when someone with tinnitus doesn't even realise they have it, because they've forgotten what silence sounds like. When I started thinking of Myself as trans, I experienced that metaphorical silence, and then I could hear the metaphorical ringing that was My dysphoria.