And such the foundation of the US falls, it is such a pity that the walls of it still stand despite.

David L. Rosenthal, sir, though 'act' and 'behave' may be used interchangeably, their noun forms cannot. And if I read correctly, then the entire issue only mentions how the noun forms can be interchangeable, which they can not be. The quote itself can be very much true, a vice itself is not a crime, but the inevitably attached strings to the vice can be harmful (and therefore can be interpreted as criminal).