How? It's exactly the same as an option to remove the userbar or not.
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Also it can't happen because you won't really be able to tell the difference if the person if VIP or donator if you remove your userbar. But yeh we are treading on thin water as it is in terms of trying to allow as much as possible with the donator, I can't see there being anymore extras like this allowed without breaking that rule set by Habbo.