afk farm equals auto clickers
Merrilee will auto defend/attack when you are attacked, no macro required. (when in attack mode, even if you're afk)
~because she loves you!
(Merrilee the Cheery Sylph)
It doesn't work for Sigrum, Serif, Grimm or the Unicorn (I tried), so anyone using those in afk-auto are indeed botting but not the one's using Merrilee. This arrangement makes the botters stick out like a sore thumb because they see Merrilee doing it and think it's okay to bot, when in actuality she isn't using a bot but instead a built in feature, that the others don't have.
Perhaps intentional perhaps not; facts are facts and that's the way it is; at the moment
This reply is based on the four possible starter Eidolons and Sigrum, information on the nature of auto-attack may vary with other Eidolons obtained via keys, events or otherwise.