The "Killing while noclipped" module is slightly buggy. I have VCMod on my server and TDM Cars, when you crash your car into a wall, you take damage, but when you die from taking damage from crashing into a wall, awarn automatically warns you for killing in noclip. And when you kill people while driving a vehicle in god mode, you do not get warned.
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Also, is there a way to remove a specific warning from a player?