This is reminiscent of the debates I took part in the Wikipedia over "libertarian socialism" and "anarchism". The word libertarian (as opposed to liberal meant  left-anarshist or libertarian-socialist unambiguously for over 100 years before the temr libertarianism was hijacked by right libertarians in the US (and it still retains the old meanings outside the English-speaking world). This is similar to what has happened to the word "liberal" in the US.

Good thing that some people are taking explicitly left-libertarian positions, but they should not be apologetic about it. They should attack right-libertarians as usurpers and right-libertarianism as a late-20-th century disease.

Then again, if you take libertarianism to its utmost consequences, the left/right distinction becomes less important.

Those whom the Gods wish to destroy They first make mad. — Euripides