This is a problem with any big organization; you are at the mercy of any small group supporting or attacking your interest, and their influence is magnified by the money they have.
That's why the Internet is 'liberating' in that it gives voice to anyone, so long as google, now the dominant search engine, remains open and doesn't censor or favor particular websites and suppress others.
Thus, its important to support the opposition groups, a key one is
https://www.eff.org/In general, supports an open Internet or net neutrality, SOPA is just one issue.
Everyone should join the EFF, its the single biggest organization that coordinates with others and actually takes the issues to court, at least in the USA.
SOPA is about intellectual property and giving more teeth to DMCA, which everyone already dislikes.
But open internet is even broader, it prevents your ISP from filtering lawful content, so it prevents them from cutting off say a competitors web hosts, in favor of their own, more than just intellectual property. There are very few backbone providers, Tier 1 as its called, so if Tier 1 folks decide who sees what, you have censorhip that would make even google weep, they are the true keepers of the keys.
http://en.wikipedia.org/wiki/Internet_backbone#Modern_backboneVerizon is particularly scarey. It not only is a major backbone for the entire Internet in the USA, but also an ISP. It has the capacity to cut off all other backbones from its network and other ISPs and create its own private Internet in hardware, not just what Facebook attempts to do, which is trivial compared to Verizon's capacity. Thus, if you go to fcc.gov you'll see a lot of lawsuits by Verizon against the FCC, as the FCC tries to keep Verizon open.
And... have you noticed...
The mainstream media have provided virtually *NO* coverage of this issue.
Why?
Because their bread and butter is copyrighted intellectual property so they'd love SOPA to make it into law.