Do what you want w/o stepping on another persons rights.
That's not a libertarian ideal, that's just being a normal person. Though I can see, in this political climate, why a libertarian would want to express it. Libertarianism comes more into play when the topic is how we as a society decide what to do in order to preserve those other persons' rights and what we should do to someone who violates those rights. It also comes heavily into play when discussing what those rights actually are and where they apply.