[MJM]

Xenon it's has been the greatest pleasure to use your mod, and Dark Visor I'm looking forward to your new version.

Now everybody, use this mod wisely and creatively, and don't let anyone use it who is irresponsible. The integrity of your site is at stake.

irresponsible
adj : showing lack of care for consequences; "behaved like an irresponsible idiot"; "hasty and irresponsible action" WordNet

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Something to think about for a future mod ...
Limit a usergroup to only allow change of username to specific registered pseudonym usernames user is permitted to have.
For example, for users with dual username registrations, ie, a professional and personal username etc.
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Cheers,
~ Mark