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Blizzard says that modding Diablo IV can result in a permanent account ban
(www.techspot.com)
This is a most excellent place for technology news and articles.
I can't speak for Acti-Blizz but Ubisoft regarded people finding and using exploits or even power imbalances as cheating and a banhammering offense if they got too much loot for their efforts.
Finding the exploits is part of the whole point.
Imagine banning people for playing the game the way you created it.