A shame if a child that accidentally threw a ball in your garden steps on them, or even just the overweight neighbours cat. Or a visitor stumbles on them duling a bbq. But such casualties are apparently a small price to pay for feeling safe.
Perfect use case for IoT mines and AI object/face recognition
Why would a hypothetical attacker wander through the garden anyway, instead of walking the normal path to the front door like a normal person? That face recognition will surely blow up the first pizza delivery person that has the misfortune of delivering to your house. I hope you tip well.
Landmines in the garden it is then. Hard to use offensively.