This was already posted and discussed here, and you may want to view the commentary:
http://www.freerepublic.com/focus/f-news/881272/posts I would make a couple points:
1) The Socialist Workers sued on this twice and won in both the Supreme Court (Brown v. Socialist Workers Party 74 Campaign Committee) and the U.S. Court of Appeals (can't recall the case name). So the FEC doesn't have much choice - if they deny the exemption, the Socialists will just sue them again, and probably win. And the FEC has to keep applying the law to the rest of us, because Congress won't repeal it, and the Supreme Court won't exempt everybody - only groups showing they will be especially "harassed."
2) The real question here is why should the rest of us have to disclose? Why should anybody? John Adams and Thomas Jefferson and Andrew Jackson and Abraham Lincoln didn't have to disclose their donors. The Federalist Papers were published anonymously. Where does the government get off keeping and publishing a record of our political activity? (Isn't that what they're doing here?) This is all part of "campaign finance reform," and it should all be declared unconstitutional by the courts. But since the courts haven't done so, we must fight these laws in congress.
3) Maybe we can use this. Why shouldn't Pro-Lifers get this exemption? Don't we get harassed? But if you give money to Right to Life's PAC, they have to file it with the FEC. Maybe some of our groups should compile a record of the harassment our members receive, and ask the FEC for an exemption.