Hides rocks to throw at passersby?
Must be a Palestinian ape.
;^)
Let’s take the experiment one step further.
Set up a few old-fashioned catapults or trebuchets, just out of his visual range, and fill them with a bunch of small rocks. When ever he throws a projectile just launch a retaliatory strike with a catapult-full of rocks and see what happens.
How many times do you have pelt him with a salvo of rocks to deter him from throwing rocks at the visitors?