Quote from Facebook:
Dear players! Today we introduced a new anti-cheating system, which will eliminate usage of illegal programs – bots – from our game. Players who use bots will not be able to participate in rankings, tournaments, championships and duels. They will only be visible in the bot users ranking which will be the prove of their dishonest actions. We hope that the new system will make the game more pleasant and satisfying for the honest users!
Source: link .