Very similar to a handful of hot-button topics. Anyone who dares to criticize or publish about [censored*] runs the risk of fines or prison, even in many supposedly "free" Western nations. Even in nations that have strong protection of freedom of speech and thought, these topics can and do lead to witch hunts, lawsuits, government investigations and often ruined careers. Again, this is not about an authoritarian regime like China or the old Soviet Union. I am referring to several nations in Western Europe, North America and elsewhere in the "rich" world.

*I'll not say exactly what it is, except that it is what, in saner times, would have been questions of little interest beyond academic study, debate or interest.