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Yes the data is available to anyone, but at least it involves some technical prowess.
The amount of times i have seen people discuss some users votes and what they interpret into it is just weird. let them at least dig for the stuff a little bit.
from a privacy standpoint it would be great, if the data could even be hidden from admins. while still allowing to do some verification (like in these governance threads). but that is a problem for the lemmy devs.
i don't know activity pub well enough to say what is possible to do on it. i was just saying what would be cool, to avoid tyrading users, based on what sometimes seems to be one or two votes.
IMO vote spam is just buildt into lemmy. spinning up your own instance and pretty much nuke any post, user, community, ... you want is not that hard. i thought of writing my on POC for a 1 click script like that - but did not end up doing so, as i was too lazy.
i guess that is my main motivation behind being against easily accessibly insight into votes: most ppl are too lazy to do it themselves. it is good to know anyone can access it. but they have to put a little effort into that.
you and i will probably not agree on that, but that is fine.