YSK: Your Lemmy activities (e.g. downvotes) are far from private - eviltoast

Edit: obligatory explanation (thanks mods for squaring me away)…

What you see via the UI isn’t “all that exists”. Unlike Reddit, where everything is a black box, there are a lot more eyeballs who can see “under the hood”. Any instance admin, proper or rogue, gets a ton of information that users won’t normally see. The attached example demonstrates that while users will only see upvote/downvote tallies, admins can see who actually performed those actions.

Edit: To clarify, not just YOUR instance admin gets this info. This is ANY instance admin across the Fediverse.

  • Distributed@lemmy.worldEnglish
    11·
    1 year ago

    This was my thoughts as well. I understand the need for an audit trail.

    Would be very easy to build up an interaction graph with this data that could be used for fingerprinting. If this is an issue for you, though, just browse without signing in/interacting

    Was just thinking about this more though, and unfortunately there can also be rogue instances that allow bot users to be created and interact with other instances posts, so this issue could still persist.

    • plumbercraic@lemmy.sdf.orgEnglish
      19·
      1 year ago

      Could replace the usernames with UUIDs, and keep the username-UUID map back on the source instance? Then you get an audit trail, but not associated with user identity. There’s also no guarantee that people don’t use bob_jones as their username, and this is Personally Identifiable Information, which brings up some GDPR stuff too.

      • Muddybulldog@mylemmy.winOPEnglish
        13·
        1 year ago

        The problem with that is that every interaction that any user has with a post or a comment would require calls back to the home instance in order to lookup those usernames. That’s a LOT of extra load

          • plumbercraic@lemmy.sdf.orgEnglish
            7·
            1 year ago

            Yeah I just meant for the votes. If you make a comment with your username it’s pretty clear you consented for the input and the username to be visible side by side.