346860 Posts in 14694 Topics by 24115 Members.Latest Member: ataletswuo
I'm not sure about this, but I can imagine some rival sites don't like TMK- an example that I can think of immediately, DK Vine.
Right now the permissions say regular members can edit their own account settings. So if there's no option to change your displayed name in Profile - Account Related Settings then only admins can change it.