Hi!
Account verification was initially a feature for public figures and accounts of public interest, individuals in music, acting, fashion, government, politics, religion, journalism, media, sports, business and other key interest areas. Account verification was introduced to Twitter in June 2009, Google+ in August 2011, Facebook in February 2012, Instagram in December 2014, and Pinterest in June 2015.
Given how much controversy and unhealthy dynamics surrounds verified accounts on Twitter (not sure about Pinterest etc. - don't have any info there) I do not think it is a good idea to copy it. If there's an individual need to establish link between legal identity of somebody and their Wiki credentials, there are easy ways to do it - e.g. publish a signed message both on wiki user page under the account and on the resource known to be controlled by the person, etc. But I don't think special status like that would be very useful or very welcome. Also note linking one's legal identity to Wiki edits may be very dangerous in some countries. Requiring people to take that risk to edit certain pages is not really a good thing.