Should socionics enter the mainstream (which I think is inevitable, maybe not in its current form, but more evolved) there are some of potential constitutional/legal issues with a scientific process for categorizing people like this...here are a few...
Will a person be able to claim discrimination against, for instance, an employer for not hiring him for a specific job theoretically best suited for another type (e.g. ESFp not hired as a history teacher despite a degree in education and 20 years of experience against an ESTj with only a few years of experience).
Will a divorce be as simple to attain as arguing that a couple isn't "psychologically compatible?"
In a child custoday case, would a parent or grand-parent, etc...be able to make a type based argument favoring themselves based simply on theories of inter-type relationships? (e.g. an ESFj father makes the argument that he is better suited to care for an ENFp child than his ISTj mother due to the conflicting nature of the mother-child relationship).
Will politicians run based on a platform that they are a certain personality? Will this have to become independently verifiable? Would someone be able to "fake" their personality for this purpose? Would their be a penalty for such a misrepresentation (if even sustainable)?
Would the constitution have to be re-written to account for differences in type distributions to ensure that all quadra values are fairly represented?
Food for thought...