We are still actively working on the spam issue.
Sage
Sage is used on 4chan or other imageboards in order to reply to a post without bumping it on the first page. It's done by simply putting sage (or any uppercase or lowercase variation) in the optional email field. Also, nonokosage can be used to go back to the index automatically after uploading the post.
A sage is not a downvote. Do not treat it as such.
