For example, throughout the 90s and up till 2001, there were several terror attacks committed against America that will probably be remembered through the ages. Some of these attacks, at the time, sadly enough generated global expectation, as happens today with the kidnappings in the Middle East etc. Sadly enough, bad news sells, despite the pain of the families and the people involved and the many demonstrations against violence and terrorism throughout history.
One such demonstration took place in Poland very recently, where abortion was banned and thousands of women took to the streets, dressed in black to protest against this right wing governmental resolution. A similar thing happened in a few Latin American countries, with its epicenter in Argentina, where women also took to the streets dressed in black to protest against and reject all forms of violence towards women.
Either way, it might be unthinkable to make jokes about these kinds of things, domesticated or not (domesticated would be official humor in the media, which is always politically correct). But the truth is that on the streets, many people still allow themselves to make jokes about horrible stuff. Perhaps it is a self-defense mechanism that people resort to; humor. Deep down, in order to deal or cope with pain, humans might want to hold on to the only thing that can save them from darkness; laughter can be the path back to light.
For some, it might probably take many years until they can joke again about something that once was painful and that still is; perhaps being able to joke about it means that a scar tissue has started to form over the wounds that traumatic event had left. In some cases, scars might have to become leathery skin, for people not to be outraged about jokes in the media about terrorism.