A libertarian is simply someone who is for liberty and against aggression. He does not want to see force initiated against himself or others. Force is to be used only in self defense and the libertarian would say that someone may rightly use force against the person or property of another only to end an unjust attack or to to secure compensation for the damages from an unjust attack. Can conduct that is not aggressive amount to the mistreatment of others? Yes, and this mistreatment can reduce that person’s freedom to make choices about their own lives. This is morally wrong in many ways, but would be “legal” under the ideas of libertarianism.