They could realistically create some manner of server-side bot that scans the data being send from clients to automatically punish players who repeatedly exhibit certain behaviors largely limited to bots (IE, jumping in place to take flight several times in a row, since ALL types of bots exhibit this impractical behavior in HW/SB as a seeming limitation of their client).

Considering that they've yet to address the gil farmers by patching any of the many holes in the game's design/coding they exploit, that'll probably never happen.