We all have login credentials that identify our forum accounts to HTC, I don't know why our public usernames have to be set in stone. If it is important for members to be able to identify others as the same account holder should they alter their username/avatar, then everyone should be issued a fixed, nondescript ID number with the creation of the forum account as the key record. This number could be seen within someone's profile, but is not publicly displayed with every post.