So when Threads decides to federate, they can slurp all this information.
That would be massively concerning and that should be blocked. Ideally votes should remain only on the current instance. Anything shared with other instances should be anonymised. This would need to be re-architected imho.
People come here to get away from Reddit now that trust has gone. Trust and a feeling of safety is vitally important to continue to build this platform.
Only the server that you connect to so it can tell you what you voted for. It doesn't have to share who it was linked to. So voting profiles can be separated from posting as it doesn't need to be known.