The mass-produced bots seem like a bit of a lost cause unless SE is willing to impose temporary restrictions on newly created accounts to prevent them from moving their gil around before they get banned.

The "normal" bots that farm gil by spamming crafts or are simply lazy players are very much controllable provided you have a moderation team that can pick up on their not-so-subtle behavior patterns and ban them, though, as they are not going to come back nearly as quickly.