lol those trebuchetes give 2 sh!ts about your stick traps. They just spawn and start firing. Way around them is to put a funeral pyre outside that they can run up to attack or run a settler out on the front lawn to lure them in. If they have something/someone to run up and whack they won't bother firing. But if everything and everyone is behind walls and doors.....the will knock all your stuff down very quickly.

..you did build stick traps everywhere ...right?