I'd try to cover as many topics as possible. It's no good using the space alloted for say, the UN issue. Many JWs will already be satisfied with the library card response, and non believers won't see the big deal - at least not in the way we see it. You could mention they have done many questionable things during their history, such as (then give the list). If one thing sticks out for someone, they'll most likely research it.
I'd also cover any standard defenses JWs may give to anyone who speaks to them about the article. 'They may very well see this article as persecution, and this is because they confuse it with critisism. Critisism is not persecution. They critisise other religions openly, so for them to view this piece as misguided or attacking and to be offended by it essentially makes them hypocrites.'
'Whenever someone writes a positive article on their faith, they hold it up as proof that God is with them and is helping others to see the light. Whenever a negative article is written, they hold it up as proof that Satan has influence over the world, and that the 'persecution' they are enduring fulfills prophecy. Either way, whatever people write about them, it usually only solidifies what they believe. For this to change, they would have to research the reasons why people do not think their beliefs are correct. Unfortunately, they have instilled in them a fear of all things that could rock their faith, and this fear is so strong that they refuse to look into anything that could expose their 'truth' as the lies they really are.'
Well, that's what I'd write, I went on a bit then!