It has the double benefit of wide front-page exposure along with not requiring a complete break from Google's traditional UX.
I know, for instance, that my mom would be seriously flipping out if Facebook were blacked out for her. If they asked her to make a call to get through, she would call immediately and yell at the people for making Facebook not work. This would happen millions upon millions of times over, which is why people want major sites like Facebook to participate.
I find it both scary and intriguing that a small handful of companies could have such a significant effect on the legislative process merely by presenting something in a negative light to their users, and requiring some action to affirm that viewpoint before allowing the user to access the service.
Taking Facebook down completely seems extremely counter-productive for everyone. Just a button that says "I called, let me through" should be good enough, there would be plenty of people who have an aversion to clicking through that without actually placing the call, and then Facebook (and its dependents, Zynga et al) doesn't lose 12-24 solid hours of ad revenue.
I strongly agree that if Google "blacks out" anything, they should restrict it to search only. Email and other essential services must remain accessible.
Reddit isn't as large as Google, but they also have millions of daily users and depend on their site traffic for their income.
The "fiduciary duty" to shareholders seems pretty far fetched and could be argued the other way as well. Enforcing SOPA will be a heavy financial burden and negatively impact future performance, therefore not using every means necessary to block SOPA is also a breach of "fiduciary duty".
edit: could who ever down voted post a counter argument? Do you have some reason to believe that SOPA proponents would not make that argument?
They want it to pass without being noticed because they can't sugar-coat this one for the American public.
And anyone who's heard of SOPA already except a industry/congressman is probably against SOPA, and anyone who hasn't heard of SOPA aside from the Google blackout would be unlikely to hear the suspect Google motive news.
So, Con: People who are already Pro-SOPA have one little complaint to add to their little list Pro: The entire internet population becomes aware of SOPA and realizes that sh*t is real.
I didn't vote you down, but here's your counter argument.
1. Suggesting that blacking out google would not be effective is naive. It would be very effective.
2. While it would be straightforward for to make an argument that mp3.com, grooveshark, and piratebay.org have suspect motives - I don't think the majority of people think "Piracy" when they think "Google" - they think "Search."