If you have overly friendly, or overly open or just plain stupid (looking at you Comcast xfinity) wifi hotspots near you and you want to stop your kids/family/employees from using them, so they always use the WIFI you control, I’ve got a solution for you.
Enter wifipicket, also known as a wifi selective jammer, a simple tool that forcefully disassociates any known client from the non-authorized hotspot. Use it to block certain hotspots, block certain wifi clients or block certain hotspots for certain clients.
It can run happily on a raspberry pi with a wifi interface and provide a 24/7 fence to keep your fellas in. Stock it up, jam it in a closet, and enjoy total control.