Collars. Locking collars that only service provider has the key to.
Start ringing people’s next as soon as they can walk. Include an electrical shock that can be remotely operated by law enforcement.
It’s for the children.
The idea of having a voluntary ankle bracelet is strictly for your benefit, and temporary. And might save you from prison time, if used as an alibi.
Think of it like security cameras in your home against intruders. 99.999% of the time you don’t need them, but when you do, they are awful handy.