In a longer discussion during a couple of 500 games a great and evil proxy-approach was clearly detected.

Gauntlet15
Joey44
Colonia

are all the same person. All their bickering and discussion is made to disguise that fact. Check your self: They sit the same table very often, they leave the same time, a minimum of 2 of them is playing to "wind up others".

Sufficient proof, isn't it?

I suggest no penalty as their multiple personality is developed enough to not benefit from the cheating.