mocking and quoting bigots I've seen so far
:liberalism: turns to 
"you know it's hexbear when the tankie pronoun parade shows up to force pictures of pigshit in front of you!"* real quick
[*this is paraphrased, I can't remember the exact original quote]
Or "so suddenly I'm Hitler because i think people calling themselves Fae gender is dumb"
Or "why should i need to learn a new set of different pronouns for every person I meet?" (this followed two comments after "I'm literally not a transphobe, I work with plenty of trans colleagues who feel safe around me" (average lib being scratched in real time by having to acknowledge neopronouns))
.
All of these shitheads claimed to be allies when they started interacting but our brilliant pronoun tags immediately made them out themselves as the bigots they are who only pretend to be allies because it looks bad to be openly and proudly transphobic
TL;DR: 
I've been training myself through deliberate use to use they/them whenever there's any ambiguity. It's almost completely effortless now. Rarely do I have to think about it consciously.
I now default to she/her. Don't like being misgendered, gamers? Set your pronouns
I need to start doing that on
Redditors don't care about respecting pronouns until it's theirs on the line
That's a pretty interesting idea. I'm gonna think about that and might adopt your practice.
just be careful not to do it when there isn't ambiguity - getting they/them sent my way makes my skin itch.
Yeah, definitely wouldn't misgender if it's clearly stated. Thanks!