this post was submitted on 04 Jul 2023

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YSK: Your Lemmy activities (e.g. downvotes) are far from private (i.imgur.com)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

1196 comments fedilink hide all child comments

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.

(page 5) 50 comments

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[–] [email protected] 14 points 1 year ago

Oh no, so my upvotes on c/spacedicks aren't private?

[–] [email protected] 14 points 1 year ago (1 children)

For transparency, this is what a Like payload looks like. The first part is just context for the activitiypub protocol and is pretty much the same for each message. The second part contains the actual data of the message, and the most personal detail in it is the url of your own profile, and the url of the post/comment you like:

{
	"@context": ["https://www.w3.org/ns/activitystreams", "https://w3id.org/security/v1",
	{
		"lemmy": "https://join-lemmy.org/ns#",
		"litepub": "http://litepub.social/ns#",
		"pt": "https://joinpeertube.org/ns#",
		"sc": "http://schema.org/",
		"ChatMessage": "litepub:ChatMessage",
		"commentsEnabled": "pt:commentsEnabled",
		"sensitive": "as:sensitive",
		"matrixUserId": "lemmy:matrixUserId",
		"postingRestrictedToMods": "lemmy:postingRestrictedToMods",
		"removeData": "lemmy:removeData",
		"stickied": "lemmy:stickied",
		"moderators":
		{
			"@type": "@id",
			"@id": "lemmy:moderators"
		},
		"expires": "as:endTime",
		"distinguished": "lemmy:distinguished",
		"language": "sc:inLanguage",
		"identifier": "sc:identifier"
	}],
	"actor": "--URL OF THE USER PROFILE--",
	"object": "--URL OF THE POST OR COMMENT--",
	"type": "Like",
	"id": "-- URL TO THE INSTANCE THAT PASSED THE MESSAGE--",
	"audience": "-- URL TO THE COMMUNITY THE POST IS PART OF--"
}

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[–] [email protected] 13 points 1 year ago (3 children)

ITT: we muddy the waters and people get scared because they don’t know how deep they are anymore despite standing in it

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[–] [email protected] 12 points 1 year ago* (last edited 1 year ago) (1 children)

I'd be really shocked if they recorded IP addresses as well.

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[–] [email protected] 12 points 1 year ago (22 children)

Good data if you're trying to find the homophobes and transphobes who think they're "infiltrating" and voting down every single one of those posts. They out themselves.

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[–] [email protected] 12 points 1 year ago (1 children)

What about private messages? We should assume the person running the instance can read all private messages.

[–] [email protected] 13 points 1 year ago (1 children)

Yes. While I see no reason that private message would exist anywhere other than the instance of the sender and receiver, the admins of those instances CAN see the contents of the message and whether or not they have been read.

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[–] [email protected] 11 points 1 year ago (5 children)

So this is interesting... I thought only kbin visualized voting. Does this mean Lemmy's users are also tracked on kbin?

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[–] [email protected] 11 points 1 year ago (1 children)

I'm fine with it too. Don't think I'd be here if I wasn't okay with sharing these sort of things. If I wanted privacy for my upvotes or downvotes (why tho?), I'd do it anonymously.

And yeah, I upvoted the beans as well. Ate beans 90% of the time as a student. Still farting from it 20 years later.

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