I disagree. I think the point is that being a member of the BSA does imply support of SOPA. Which is the very reason its members were forced to make the BSA change its position.

It was a grassroots campaign of unaligned users of the internet. People from vastly different professions and backgrounds enacting change through varying means; twitter, direct mail, facebook, google+, blogs, articles, comments etc.

There is no system. That's what makes the internet awesome.