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So it turns out the geniuses over at Bluesky trust the client app to fetch, and honestly report, webpage metadata for preview cards, so with a little tinkering in the debug tools you can post whatever news stories you like and they look exactly the same as real ones.

bsky.app/profile/andrewt.net/p

@andrewt tbf that's somewhat minor?

I mean that client is just sending arbitrary posts as well and you could just send wrong URLs that don't fit the text.

idk why you would ever do it that way, but i've seen worse.

@dat @andrewt couldn't this be fixed by the server digitally signing the card metadata so that it can't be modified? If the card metadata is sent back modified, the sighash breaks and the server should reject the post.

Andrew

@ikeacurtains @dat it could, but it sounds like bluesky don't want to do that kind of solution because "the server" could be anyone. you know, because bluesky is """decentralised"""

@andrewt @dat no solution is perfect but something is better than nothing. *gestures at DKIM*