alt Hacker NewsAnd if you grabbed the knife and went on a violent spree, I'd absolutely expect the knife manufacturer to refuse to sell to you anymore.
The knife manufacturer isn't obligated to sell to you in either case, I'd expect them not to cut ties with you in the self defence scenario. But it is their choice.
The knife manufacturer would be more than happy to continue to sell to you, except for that minor little detail that you're in jail.