> Since corporations only exist due to special protections granted to them by the government, many (most?) libertarians (myself included) do not consider them to be actors in, nor an accurate representation of, a true free market.
I don't think it's quite that simple. In an unhampered free market it is possible that people will voluntarily choose to organize themselves into groups that function according to similar rules as those that what we now call "corporations" do now. There will be no limited liability (with regard to lawsuits; limited liability with regard to debts can still exist as part of the loan contract, so conservatives' fears that without limited liability there will be no business at all are quite unfounded), so people will be punished for fraud and environmental damage more, and things will be better in that regard, but the format of the large business as a whole could still exist. And there's nothing wrong with that - it's never as simple as "rich people are evil"; look at the so-called "robber baron" era of the 19th century - some rich people got their way through powerful friends and corruption and government-assisted cartelization, while others played fairly on the market and used their fortunes to set up institutions that continue to serve the public good even now (see: Nobel prizes, American non-profit universities, etc). It's exactly the same way even now.