So do nothing and let it continue or get worse. Nah; I’ll take my chances with labeling them and registering them.
No animal, not even farm animals which will be processed for food, should ever be abused. The goal is to identify these sick people and keep an eye on them. We already know they have no sense of empathy making them potential killers without cause or reason.
A good hunter would never let its prey suffer from a bad shot. He would kill it as soon as possible.
If I had my way; people who do harm to animals that can’t protect themselves would be put away to never live another minute in civil society. They have proven they are nothing but a rabid animal who should be put down for the good of everyone. They are not human.
By what measurement is it getting worse and how does a registry prevent this?
These types of "feel good" laws never accomplish anything and are always rife with unintended consequences.