I've noticed that while working on a multi storied farm, using AutoFarm causes more than 1 floors to be farmed at the same time like a wall hack which is a problem due the fact that you can not collect other floor's seed or the crop and this also gives other players a chance loot it.
So add an option for "Line of Sight" in the Autofarm settings to prevent this wall hack type problem.
I've also seen line of sight in Kill-aura-legit.