Whether repeated obscene and sexually explicit telephone calls, though not prohibited by statute, could constitute a common-law misdemeanor in Pennsylvania.
Holding
Yes. The calls were punishable as a common-law misdemeanor because they were conduct capable of injuriously affecting public morality.
Reasoning
Pennsylvania retained the English common law of crimes except where legislation had displaced it. The relevant inquiry was therefore not whether a reported case had previously punished precisely the same conduct, but whether the conduct was of a kind that could have been prosecuted at common law.
The court relied on the established common-law principle that an act may be indictable when it directly injures, or tends sufficiently to injure, the public so that the state must intervene. This includes conduct that injuriously affects public morality, even if no exact precedent appears in the reports.
Mochan's persistent calls were not merely private insults. His obscene, lewd, and graphic sexual language, directed repeatedly at a stranger in her home, was conduct the court regarded as scandalously affecting public morals. The possibility that a telephone operator or others on the shared line could overhear, together with the fact that members of Zivkovich's household actually heard portions of the calls, supplied a public dimension to the offense.