Honest question, and I ask as strong proponent of liberty and the right to bear arms, from your perspective, do you think there is ever a time a group of individuals should force another individual not to have a weapon?

For example, this vending machine, I know it represents removing state restrictions and interference, but what about issues of legitimately evil or insane people who wish to commit harm?

I recognize inherent dangers of allowing the state to make the decision, which is why I'm curious to know a libertarian response.