1) Name dropping was never a valid argument. Nor is showing a contradicting proof. To counter the violinist argument you must take issue with either the form or a premise of the argument. Then you must argue that you are right to take issue. However my goal was to inform not convince.
2) Review Positive right to life vs Negative right to life. Then consider the case of indefinite life support for the poor.
My problem with the violinist example is that you see you can save a person's life and choose not to do so. The violinist is not threatening your life, thus he is not being a negative right to life towards you.
Wow. You missed the argument by a hair.
The Violinist argument is that:
The violinist has a negative right to life. (Thus killing the violinist is immoral but letting the violinist die is permissible.)
Disconnecting the violinist is letting the violinist die.
Disconnecting the violinist is permissible.
A positive right to life implies that if you die everyone that could have prevented your death is guilty if immoral action. If people have a positive right to life then (give the capacity of today's life support) everyone is entitled to literally indefinite life support. It is clearly impossible to provide unending life support for an exponentially growing pool of people. At some point there will be enough for 1 person but not enough for everyone. This point is when we can see the positive right to life contradicting itself. Hence why the right to life is assumed to be a negative right.
So, how do you counter the argument of 'do as much as you can?' You're right, we can't save everyone, nor can we make people immortal, but we can do as much as we can to keep them living. You can't defend the entire country sometimes, but is that reason not to defend what you can?
I get what you mean by the right to life being a negative right. I think you should also talk about knowing people in other countries are dying. Are we responsible if we don't help and could have helped? We can't travel everywhere at once, but by doing things by giving money, even a small amount, we can make a difference. So, are people who don't donate to causes like invisible children or other organizations that help dying or threatened people just as bad as the guy who let his friend die right in front of him?
The other fact you didn't answer was direct negative right to life. Actions must be direct for most cases of this topic. Philosophers do agree to something like this: if A has a negative right to B, B must refrain from killing A.
In the violinist example, letting the guy die is not a direct act of killing him, but the knowledge was directly known. This is why you cannot simply say it was permissible. When you bring up permissibility, remember that morality=actionxmotive.
If I was going to argue to let the violinist die, I would try to justify my motives at the time. What if making me wait in that room was stopping me from saving 2 human lives? Do i disconnect the violinist, let him die, and save the other two lives? Also, let's talk about human worth. You are connected to the best war commander ever instead of the violinist. The country needs him to save the country which has 1 billion people. If you stay to save him though, 2 lives in the other room will die. In fact, let's also talk about just 1 life in the other room will die, in fact this person is in a coma and has severe brain damage.
Human worth come to mind?