Hey! It has actually been available for a long time. So the FAQ is a bit out of date... 😊
Whenever you do a transfer to Dusty the reply will include instructions on how to proceed. HEre is the text:

Your account is only protecting incoming votes. (Other people voting your posts/comments) - To change mode, send a memo to @dustsweeper with the words: ININ, INOUT, OUTIN or OUTOUT. E.g. INOUT will protect both incoming and outgoing votes, but will prioritize incoming. ININ will only protect incoming votes.