Exactly. Basically everyone else in my entire family has no clue about SOPA, or if they've heard of it, what it really could mean for sites they visit every day.
If web giants -- those that are used most by those unaware or uneducated about SOPA -- were to post a page about SOPA in place of their services, people would have no choice but to take notice and learn what "this SOPA" is all about.