and am amused that it is being attacked at once both for being too radical and for not being radical enough

This has been cracking me up, too. I think, though, that that should show us how difficult and/or impossible it would be for one organization to claim to embrace all of fandom. After all, a great number of creators of fannish works do not see themselves as subversive in the slightest, and resent their association with radicals.

for legal reasons chan and/or underaged readers will not be allowed

Has this been confirmed, or is this speculation?