

The comparison doesn’t work because both Lemmy and Mbin are implementing the same standard, while robots.txt is mostly an honour system.
You should assume voter data is fully public and fully open. It otherwise is in the federated ecosystem.
Information not being private isn’t the same thing as information being public.
I didn’t say it was private, I said it wasn’t public, there’s a difference. If you asked me what number I was thinking of I’d tell you, but that’s not the same thing as the number I’m thinking of being public information. ActivityPub is, at its core, about consent. We have consented to having our data be sent to any person able to serve 200 responses on an inbox endpoint by using instances with open federation. We could, if that makes us uncomfortable, moved to a closed federation system where we only accept request from an allowlisted set of instances, with software that follows the spec’s public addressing system.