CW: Scarecrows
Why not have some multifunctional scarecrows, ones which don't just scare crows away but also any potential intruders, how you may ask?
Give them the ability to move and maybe attack if they feel like it. Although to have them do that effectively they should probably also be built differently to regular scarecrows so that they don't end up rapidly destroying themselves by the simple process of moving their limbs.
Also give them like an obvious weak point like a wooden mask or panel with a magic symbol carved onto it which has to be taken of or smashed otherwise they'll just keep on attacking until they're shredded clothes and straw. You could also probably do the same thing with dolls or mannequins or statues or stuff like that, but just with faces replaced with the symbol thing so there's the extra creepiness of facelessness.