There must be more behind this social good metric that you keep bringing up, care to cite where that comes into play? What merits social good, and who decides

There must be more behind this social good metric that you keep bringing up, care to cite where that comes into play? What merits social good, and who decides it? For example, if I go to a train station and tell people horses have purple hair, is that not free speech? I wouldn't consider that ridiculous statement a social good, it really serves no value and doesn't better society. Am I breaking a law or ethical standard if I do this?