Oh, my bad, I have yet to get used to the fact that we're having the same discussions over different apps. :)
If you can install custom stylesheets (some options are documented here), I've tested this rule to work for removing downvotes:
.vote__down { display: none !important; }
It will work only for you, though, not for other people on your forum (unless you're an instance owner and can change the website stylesheets file).
An other rule to remove upvotes if you want to:
.vote__up { display: none !important; }
You're welcome, if I did my part to fight online harassment, this is a good day. :) You should consider legal action, though, if you have laws against that in your country (I assume it's most countries, nowadays?). The instance of this or those guys can be subpoenaed to provide their IP address, which then can be used to uncover their identity.
Thanks for the invitation, btw. The whole concept sounds fun. :) I enjoyed the article about imagination engine, it's on the edge of phenomenology, but still keeping things rational (I have a history with phenomenology 😅). I have my own way of exploring my imagination (written solo RPGs, it's basically how I spent my evenings), but I'll have fun reading your content. :) Enjoy!