[shrug] ok.
Walls can be traversed. They may hinder, but can still be cut or vaulted.
True. Even the Berlin Wall was breached. Regardless, do you advocate doing nothing? If not what would you propose?
Simply add motion sensors in every 5th wall and seismic transducers in the ground. Don’t forget the freefire drones flying overhead, operated by kids who think they are in a computer game to get the most kills.