True. OTOH - I suspect that OD specialist officers, summoned to your property by your "I found something in my garden that looks a lot like that WWII mortar sh

True. OTOH - I suspect that OD specialist officers, summoned to your property by your "I found something in my garden that looks a lot like that WWII mortar shell in your Call-us-immediately-if-you-see Guide" phone call would be far more benevolently inclined than regular police officers coming to your property for most other reasons.