You've got to invite us over to your 'rec' room.
The rec room is private, but you are welcome to visit my living room. The tank sits at the center where most people have their coffee tables and the couches are placed alongside. The barrel is aimed directly at the main door. When people enter through the main door, their first view of my home is down a deep long dark tunnel. If the lock is tampered with it will automatically set off a blast, but fortunately the door is replaceable and I have a dozen spare ones in the garage. If any of the windows are opened from the outside without first deactivating the attack switch, the turret will swing toward the windows and blast them away.
My living room is quite secure actually. If there is a power outage for some reason I usually climb inside the tank and spend the night inside reading a book.