These gadgets are readily available to members of the public, with no regulations covering their use or manufacture.
The excuses for their use I've heard today range from livestock chasing & escaping from the garden to leg humping & barking in the car. All the owners claimed to love their dogs & have their welfare at heart.
If you love something why would you want to inflict pain on it ?
Too many people want the perfect dog, unfortunately , like people, dogs are never perfect. Often what we see as unacceptable behaviour, is perfectly normal for a dog.
If a behaviour is harmful to the dog, other animals, or members of the public, it can be modified.
But, there is no such thing as a quick fix, these things take time & patience & in the meantime good management is needed.
Training.... should always be Force Free & Fun..for all parties !