fe.settings:getUserBoardSettings - non array given[operate] - Endchan Magrathea
 >>/18775/
That should be two different thing.
The R9K stuff is enabled by BO, it's a board setting that detects similar posts. In the near past I saw a spam/flood there which was basically the same word repeated in posts. I assume to block this, the BO enabled the setting.
The "known spammer" is this:  >>/11813/