Inappropriateness

[1] It differs from things that are illicit in that inappropriate behavior does not necessarily have any accompanying legal ramifications.

Although social ills are usually outlawed in wider society, there are many examples wherein various jurisdictions give their inhabitants full discretion over certain aspects of their lives so they can police themselves without any intrusiveness.

[4] For instance, although it's legal to flatulate in a crowded elevator, there are strong social pressures not to do so.

[7] Increasingly, the term is used in the context of sexual misconduct, especially touching of erogenous zones such as the genitalia or sending photos of said private parts.

[8] In the United States, the Supreme Court has ruled in FCC v. Pacifica Foundation (1978) that the Federal Communications Commission has the power to punish constitutionally protected but "indecent" expression on radio and broadcast television.