My only problem with such philosophies is that they tend to ignore human nature. Really nice in theory, but in practice, some thugs will always organize to control the masses. That's a lesson in History, not a dumb statement.

One might argue that now it's different, people have access to much more information than before, and that given enough time to educate the public enough on these matters of government, the Anarchist or Libertarian movements could gain critical mass and truly work.

I think not, simply because that would do nothing to change human nature. Most people, no matter how rational they can be in their everyday life, have emotions and desires, which aren't rational. Thus my impression that organized groups of people would always strive to control the masses.