http://legal-dictionary.thefreedictionary.com/moral+turpitude
Moral Turpitude
A phrase used in Criminal Law to describe conduct that is considered contrary to community standards of justice, honesty, or good morals.
Crimes involving moral turpitude have an inherent quality of baseness, vileness, or depravity with respect to a person’s duty to another or to society in general. Examples include rape, forgery, Robbery, and solicitation by prostitutes.
Many jurisdictions impose penalties, such as deportation of Aliens and disbarment of attorneys, following convictions of crimes involving moral turpitude.
The key words there are “community standards”. Considering this particular community, it’s not unexpected for this to not be considered a violation.
“Community standards” in San Francisco? Ick.