text: why doesn't yahoo! let u change ur id? i am getting tired of my old y! id and would like a new one, but that means i would have to get a new account. kind of like your ssn, y! id is a key to many data stored in its system.  changing your id would force yahoo! to go through million and million of records and change the data accordingly.  for example, what would the site do with emails sent to your older-id@yahoo.com?  try to change your ssn, and you will see similar problem, though with greater magnitude of complexity due to the data size.