Re: The real point
"That's like saying if someone steals your car and runs someone over, you're liable as it's your car. The person actually doing it is liable, nothing to do with the device or account involved."
Try this as it is closer.
Giving your car keys to your mate knowing he is going to commit a bank robbery using that car.
You are liable as you have assisted in an offence.
In this case not only was it his "car" but his shotgun registered in his name as well.