By this, I mean raising the issue of something like gay marriage, contemporary politics, abortion, euthanasia, racial equality, questions of religion, etc. It need not be overt; one could, for instance, use elf-human marriage as an analogue for interracial marriage. A society could mandate the death of anyone who reaches a certain age or degree of infirmity. And so on.
I'm curious as to whether anyone here had actually done a game like that and if so, how did it go?