If a new account signs up and makes 10,000 posts in a minute, and the first 10 are flagged, then you can probably delete the remaining ones with high confidence

If a new account signs up and makes 10,000 posts in a minute, and the first 10 are flagged, then you can probably delete the remaining ones with high confidence. I also imagine that they have sanity checks for their systems. Either running classifiers again previously identified spam, or running manual sanity checks against deleted items.