There is nothing sacred about the 9/11 terrorist attacks. Many events in history have had more casualties, been more tragic, etc. There is no need to self-censor 9/11 related content.
The ads are insensitive and trivialize the loss of so many families. I wouldn't say they are all inappropriate: The smoking ad in particular strikes me as though-provoking and shocking, but in a way that accomplishes the intended goal. Some of the ads though are just exploiting a tragedy for sales. The arthritis ad in particular.
As for The Courrier International's ad, wtf? Seriously what is the point? It's like they wanted to use 9/11 but couldn't find a good reason to do so. Is it supposed to be funny? I'm only laughing at TCI.