Sorry, but it's seriously making me twitch. The apostrophe should be after the word 'Unschoolers', not before the S. An apostrophe does not mean 'Hey look, there's an S coming!' The network belongs to multiple radical unschoolers; therefore it's a radical unschoolers' network. Can it please be fixed? It's not about 'giving a bad impression of unschoolers' or anything like that, although that may be a concern for folks; it's just that it's terrible grammar, it's way too common these days, and it makes me TWITCH. And I can't possibly be the only one.
Also, by the way, this category has a typo. 'Radicual' isn't a word. ;)