It is not an abuse of anything... it is Khaleds website and he is completely entitled to do as he pleases with it. All the same links are still the same..the article was hardlt instrusive.. so I don't see how it is inappropriate. I think it's very commendable of them to try and aid others by using this site to put forward a cause.
Abusing the popularity of the client would be putting something within mIRC itself... although still perfectly within Khaled's rights.
I see it as utililizing the popularity of the client to try and gain support for a cause that is trying to save peoples lives.. similar to the red cross thing..
And your analogy STINKS. This is THEIR website..they were not invited by anyone to speak or post on it. They are the host..therefore they make the decisions.