Well first off, I doubt someone would even waste the time and energr over the Copyright Protection of their Facebook comment. Otherwise, I would have to question the true priorities of said individual.
Second, even IF the Facebook comment was under copyright protection, I will bet, if anything, that Gannon's post would be protected under the Fair Use Act of 2007, as he's not claiming ownership of the post and I'm quite sure he's not profiting from the Facebook comment.
Third, although it's true that Copyright protection is technically automatic, said individual must still officially register the Copyright Protection with the government before they can bring forth a lawsuit for infringement [[according to
http://www.copyright.gov/help/faq/faq-general.html).
Now if the real issue you have is with the context of the Facebook comment itself, then just say so and keep the other passive-aggressive crap to yourself.