Taboo

Societal or cultural prohibition

A taboo, also spelled tabu, is a social group's ban, prohibition, or avoidance of something based on the group's sense that it is excessively repulsive, offensive, sacred, or allowed only for certain people. Such prohibitions are present in virtually all societies. Taboos may be prohibited explicitly, for example within a legal system or religion, or implicitly, for example by social norms or conventions followed by a particular culture or organization.

This keyword could refer to multiple things. Here are some suggestions: