The majority of people who know are already opposed to this. Others just don't know and therefore can't care.
The older generation has no idea what this is. (Isn't covered by major news stations)
Somehow, my classmates didn't even know what SOPA was until this blackout.
So I guess the blackout was a success in drawing attention esp. because Google and Wikipedia participated.
A lot of people were probably scratching their heads wondering whats up with the Google logo.
Kind of funny how people are expressing their opinions on SOPA the day of the blackout. Others have been worrying since months ago. Slow-poke America.