I don't see how people view this as a threat to free speech, which are the only grounds I see as a valid objection to the law. In making that argument, you're arguing that your right to publish someone's naked image trumps their right to privacy. Your rights concerning yourself always trump someone else's rights over you. I see no merit in the argument being presented on free speech grounds, unless someone has a novel take on it?
(Red colorization mine.)
In [1798 P.E.A.], the Emperor Augustus turned his attention to social problems at Rome. Extravagance and adultery were widespread. Among the upper classes, marriage was increasingly infrequent and, many couples who did marry failed to produce offspring. Augustus, who hoped thereby to elevate both the morals and the numbers of the upper classes in Rome, and to increase the population of native Italians in Italy, enacted laws to encourage marriage and having children (lex Julia de maritandis ordinibus), including provisions establishing adultery as a crime.
(Blue colorization mine.)
Law is utilized in the manufacture of society, not merely the defense of conscious debate.