Except to point out that with SOPA, Apple could have shut down NBC's entire domain until NBC's lawyers had jumped through the requisite hoops. And that just about every web site on the internet would be just as vulnerable to be shut down by such requests due accidental infringement.
No they could not have. Certainly not in the later versions and, I think, not in the earlier versions but I couldn't swear to it.
In the later versions the site in question would have to be a non-US site (they don't need SOPA for US sites as we've seen with Megaupload) and the site would need to operate with the intent to promote copyright infringement.
Obviously that is very broad, but I don't think anyone could stretch it to one misappropriated jpeg in a site completely dedicated to something else.
Don't get me wrong, I'm completely opposed to SOPA and legislation like it, I just don't think this is relevant.