Reader Erica points out this story about a resourceful British maker -
A British businessman fed up with being targeted by vandals has installed a 30-foot Roman-style catapult on the premises to hurl bucket loads of chicken manure at culprits attacking his rural offices.
The defense arrangements, which include priming the catapult with chicken droppings from a nearby farm, include 32 closed-circuit TV cameras, security fencing and motion-sensor lights — all guarded by a no-nonsense sign that reads:
“WARNING: These premises are protected by smart poo …”
Wow, I wonder if he’s considered writing an instructable for that setup.
Read more – Ex-stuntman targets vandals with nasty catapult