Sure, but those laws apply to US Citizens, and typically aren't enforced until the person returns to US soil.

Sovereignty is a big thing in international politics. Countries as a whole are loath to meddle in other countries domestic affairs, even in extreme cases like genocide/ethnic cleansing. Violating weird online protection laws are not the sort of thing a country is going to risk an international incident over.

Sure you can find some examples of countries that violate those norms, but they are the exception not the rule.