A deleted post frequently keeps spreading as an image for weeks afterward. The screenshot is a copy that the original author has no control over, and that is the whole of the mechanism.
Deletion only removes the original
Removing a post removes it from the platform's servers and from the author's timeline. It does nothing to the copies already saved elsewhere.
Because a screenshot is an ordinary image file, it circulates through the same channels as any photograph and is subject to none of the platform's controls.
This is why a correction rarely catches up with the thing it corrects: the correction is a post, and the error is now a picture.
Context is cropped out before it travels
Screenshots are usually cropped to the part that provokes a reaction, which removes the thread, the quoted post and the timestamp.
A statement that was a reply, a joke or a quotation reads as an original assertion once the surrounding conversation is gone.
The crop is often not deliberate deception. It is just what fits, and what fits is what spreads.
Images resist the tools built for text
Platform systems for labeling, linking and downranking are built around posts and links. An image containing text sits partly outside that machinery.
A fabricated screenshot is trivially easy to make and much harder to check than a live post, which can simply be opened.
Verification means finding the original, and if it has been deleted there is often nothing left to compare against.
Archives are the only real check
Web archives and third-party monitoring services preserve some posts before deletion, and journalists rely on them heavily for this reason.
Coverage is partial. Archiving depends on somebody having captured the page while it was live, which happens for prominent accounts and rarely for anyone else.
The asymmetry means a public figure's deleted post can usually be verified, while an ordinary person's cannot be defended.
The format rewards the worst version
Among many screenshots of the same event, the one that spreads is the one framed most starkly, because that is what gets reposted.
Over time the harshest crop becomes the canonical record, and the fuller version circulates only among people who go looking.
That drift is the durable cost, and it applies equally to screenshots that are entirely genuine.