The new possible comment abuse flag is raised whenever a user adds many non-constructive or rude comments.
Yesterday, a user added 4 rude comments, thus raising the flag. 4 minutes later, they deleted the post. Once they deleted the post, the PCA flag was automatically cleared. Hence their act was never made known to the moderators.
Thanks to a custom flag by another good user, we managed to catch the user and sent them a warning. But what if the user was not flagged?
Hence, I request that PCA flags must not be cleared on a post, even after the owner of that question has deleted the post.