The problem with the platinum rule is that we have no clear and unambiguous language for advertising how we would like to be treated.<p>In _This Alien Shore_, by C.S. Friedman, one planetary culture, the Guerans, is essentially a human colony, but one where gestational biochemistry has been mutated to the extent that every adult exhibits at least one type of human mental disorder. They adapted by adopting a system of face markings so that people don't make simple but potentially dangerous mistakes--like hugging someone with an autism spectrum disorder, or holding eye contact too long against someone with a dominance disorder.<p>The point is that you would really have to either put extensive research into the preferences and personalities of everyone you know, or everyone would have to write key information across their foreheads every day.<p>Our society, lacking a dire need, does not care to invest in that level of effort and openness. It is far easier to follow the silver rule (don't do things you don't like to others) and the golden rule (do for others what you would like them to do for you), because those do not require extraordinary knowledge of other people's preferences.<p>In the age of social network oversharing and augmented reality, perhaps we can run an application that will superimpose another person's preferences over their faces automatically. But for now, the platinum rule is going to be pretty hard to use outside the bounds of your own family.