My username in this forum was changed to this "Luck_Jim". This was not my doing. And this username is nothing alike to any username I ever used in the last decade in any account. And I can find no notification about when the username was changed and why it was changed if it was changed by the forum's manager.
Just submitted a support request in SEGA support page, though not sure if that's the right one to contact with.
It's so wierd. The username can't be changed by the forum's user-end the last time I check. So, even it was my forum account got hacked, the hacker still couldn't do such prank anyway.