Liberty must be secured and defended for it to have any reality. Libertarians, in their desire to end coercion, must take on board the responsibility of seeing that coercion is punished. No libertarian can hope to be free of the responsibility of securing freedom. Freedom can not be given by those that have it not.
Liberty, as the absense of responsibility, is founded on a most grave responsibility, the responsibility to secure freedom for all. Responsibility is more necessary even than liberty. Reflect if you will on all the myriads of people who have demanded liberty in the past. Was it liberty for all that they were trying to acquire? Were they putting themselves forward to share the responsibility for securing freedom, or did they only want freedom for themselves, freedom from all responsibility?
The revolutionaries, guns in hand, who throw out the previous order, are they putting themselves forward to take on the grave responsibility of guarding freedom for all? Is a better life for all what they go on to provide? Who will provide it, and how?
Society is predicated on mutual responsibility. Everyone is responsible and everyone is held to account. Everyone must pay their way. Are those revolutionaries proposing to make everyone pay their share? The flip side is that everyone benefits. That is the society model. In society, everyone pays and everyone benefits. Those who benefit without paying are parasitic, those who pay without benefit are cheated.
So a libertarian society must then be a society where no one is cheated and no one is parasitic.
Is this what is meant by Libertarian Socialism?