For the same reason that there should be jokes about pretty much everything. They're a form of human communication and expression which can be very valuable to

For the same reason that there should be jokes about pretty much everything. They're a form of human communication and expression which can be very valuable to group dynamics. It is perfectly possible to joke about horrific things without intending to condone or support those things. That said, the place for these jokes is unlikely to be in groups of people you don't know at tech conferences. That's insensitive, rude and often intimidating - so don't.