Any references to moral order is prima facie suspect. Postmodernists collapse the boundaries between low and high culture, criticising those who seek to control thought through legitimate or illegitimate literature. Many see this lack of firm standing as vapid or nihilistic but postmodernism seeks to move beyond old ways of seeing and thinking, not always successfully. Baudrillard looks at an increasingly mediated world and comments on the disappearance of the real, its replacement with the hyper-real, which cloaks fact that the 'original' might never have existed. Disneyland harks back to a fictionalised America that never existed.
Prisons create the idea of denial of freedom to mask the fact that no-one is really free.
Derrida is associated with the term 'deconstruction' - analysing a text by autopsy, find sites of contradiction and disunity within a text. Rather than writing authoritatively about a text, Derrida prefers to write around it. Later theorists developed this somewhat. Frankfurt School theorists despaired of popular culture, seeing it as part of the control apparatus of industrial capitalism. Gramsci coined the term 'hegemony', referring to the dominant worldview and the indirect way that culture can be used to control by shaming the hegemony.