Briefly ill say this.
After reading the rules in the forum and taking consideration of what to do and what not. I have been wondering to ask this question.
What will happen to anew user's account if he wishes to change his username after some months in the forum?
If the user has achieved a high rank in the forum, and choses to change his username, will the account be suspected of changing hand and be tagged for that? If yes how will other users know he is still the rightful owner?
Anyone in the forum can choose to change his username whenever he/she feels like. There are no restrictions to that as long as it is for a good reason. Just in case a matter was brought against a member based on the fact of changing hand then such person have to sign a Bitcoin message to prove ownership of the account.
He has to sign a message on of the Bitcoin wallet associated to the account, if he had use multiple wallet then signing on all of them would make his prove solid.
Useful Link
How to sign a message?!