If this was the fault of the game and the mobs were dropping Proofs then there is not much anyone can say if some people in EU got lucky. That would not be considered an exploit, it would be a dumb mistake. If it were the fault of those people that constantly look for ways to exploit the game well, in my honest opinion, the penalties they got in place for those people is a joke. The exploiters can exploit and get loads of proofs and then get banned for 7 days maybe even 30 days but so what they still got their proofs. That is like being banned for exploiting TOSH, these exploiters get to keep all the TP they got and a 7 day or 30 day ban is just a mere inconvenience.
If the penalties were more harsh maybe people would think twice about exploiting. Something like if you get caught doing something like this or anything that is abusing the game, 3 times you get permanently banned. Not always a 30 day ban repeatedly over and over.
Just my thoughts on this matter.
Pyper
Palenque