Let's remember the old dictum: never attribute to malice that which can be attributed to stupidity.
I'm not excusing NBC in any way here, least of all for SOPA (those who've read my comments and writings know I'm a huge opponent of the latter). But the likelihood that anyone in any position of power at NBC even saw that page is slim to none. I've worked for NBC in a past life, and I can tell you that the divisions responsible for these web pages don't even show up on the radar. They're so far removed from the power centers of the organization that many people probably aren't even aware they exist. (That, in itself, is a problem; don't get me wrong).
If you want to find much more malicious and intentional rip-offs of this logo, they abound on the interwebz. For example:
http://cdn1.1stwebdesigner.com/wp-content/uploads/bigthumbs/...
Had NBC been using something like that, I think we'd have far more cause for indignation and uproar. Something like that image bespeaks a rather deliberate and shameless attempt to rip off Apple's artwork.