And if there is a change of username, there should be an announcement of request so the community will not be surprisedd of that username having their feedback on that account.
People usually change their username due to privacy reasons and making such announcement would defeat their purpose.
If you posted a feedback for a user and the user changed his/her username, it shouldn't be difficult to find out who he/she is.
Yea, making such an announcement for change of username might automatically translate to defeating the purpose for which the change was made.
Op, I have read that theymos changed the username of a newbie on request because the newbie actually used the combination of his real name and surname to register here. In this situation, two things happen;
1. Theymos changed the username of an unestablished account
2. Because of a privacy related issue
So, you can enjoy such privilege only if you can convinced theymos.