What to do if you accidentally post or boost something fake and it gets a bunch of boosts before you find out? Do you edit the toot or delete it?

On Twitter we had a decent system. You screenshot your own tweet and post a new message with the screenshot saying it was fake. Then you delete the original. This way, you have a mea culpa, you inform people of the fake and you stop the spread.

Since we can edit here does that change things? Do edits always propagate fast enough?

#fakenews