Here is a brief summary of why they are doing this:

Drones are becoming cheaper and more accessible, heightening fears that they could be used by criminals or terrorist groups. In this vein, the Japanese police force has recently announced they will deploy a battalion of anti-drone officers and disabling drones.

Question…How will they know the difference between a delivery drone of let’s say some donuts or a retail purchase in the future vs. an unwanted one?

Feel free to comment with your ideas on this phenomenon!  English, Dutch or any language welcomed 🙂

thanks to iflscience.com for the great info