The range limitation seems possible to overcome too. There are directional megaphones that can send sound for hundreds of meters. Directional megaphones send

The range limitation seems possible to overcome too. There are directional megaphones that can send sound for hundreds of meters. Directional megaphones send a beam of ultrasound that is focused on the surface where the sound is to be generated, so an attacker may be able to use a directional megaphone to beam the voice commands to the target's vicinity. Suddenly all kinds of movie plot tricks could be used in heist movies now! Perp uses an air vortex cannon to press a door bell button from a distance and a directional megaphone to talk to in the buzzer and then ... well, easy to get carried away :)