What does that even mean? Relays not being able to arbitrarily edit posts is by design, and why PDS updates like posts are signed by their authors. That's a str

What does that even mean? Relays not being able to arbitrarily edit posts is by design, and why PDS updates like posts are signed by their authors. That's a strength, not a weakness. The mechanism for spam filtering is the same as any other network. You can drop posts from low-trust PDSes, or use Bluesky's existing labeling system to apply advisory "spam likely" labels to accounts or posts that some heuristic decides are spam. This can be done in a composable way with their algorithmic feed aggregator and labels.