I noticed that the 'delete on sight' threat was used in this question "Robust" as a noun as a comment on this answer https://english.stackexchange.com/a/234368/71783
Whom are you quoting? Where is this from? Moderators are instructed to delete on sight any third-party material that is not properly attributed. – RegDwigнt♦ 8 mins ago
[ "Robust" as a noun ]
As I was typing this meta question, the answer disappeared. I don't know if it was deleted by a moderator or by the answerer.
Is there a policy to delete on sight and if so, is this policy now being put to use?