The privacy stinks you say? Did you know that Likes and Dislikes are public too? That was the most shocking to me. Because it is very much not like Reddit or others.
It's still a fantastic piece of software, with all its flaws, though.
I thought votes didn't federate yet anyways... but, yes, it is possible, and i can come up off the top of my head with three or four potential implementations.
FHE solves that through and through, as has been documented widely, but that's overengineering when you could just use plain ZKP.
Zero-knowledge voting is here and has been for a while now.