

God that’s ridiculous… the image hash depends on the image not having changed at all from the one uploaded by the user. If they’re screenshotted and cropped, or sent via a messaging platform that compresses them, they’ll be visually similar enough to not matter, and different enough to have a different hash. So, Zuck gets a free peek at your your nudes, and all you get is a false sense of security.
Not feasibly, no. If a centralized platform like bluesky refuses to abide by the laws in a given country, their platform can be made inaccessible in that country. Trying to do that to countless activitypub-compliant servers wouldn’t be practical since you van just hop to another server.