My weird idea: there should be a rating agency to assess the credibility of certain typers. For instance, "Mr x's typings are reliable / AAA+, whereas Mr y's typings are junk bond".
I can also recall the page rank algorithm, which can be used to assess the credibility of typings as well.
Both ideas could be absolutely wrong, btw. For instance, the Innefable's typings could be 100% right, but as most users disagree with him, he does not have much credibility when it comes to typing. In a pagerank style assessment, controversial users would probably end up discredited. On the contrary, Ashton or Aestrivex typings are widely accepted by the Western Socionics Community.