For all we know, its just one grumpy guy who made a half-baked website. Are there any members of this group? I guess the philosphy is no membership, so a better question is if anybody has acted on these principles and created a supporter group? I doubt it.
I would go as far to say that the American Outlaws haven't just created support for the USMNT, but for MLS and soccer overall in this country. There's a reason ESPN overdoes the AO love and chants and stuff.... It's what sells.