NSFW Acc: 
With this week's reset, Blizzard has pushed their new penalty for wearing 200 or more total corruption, which quickly kills you while in combat. Let's take a closer look on what this effect does. https://www.wowhead.com/news=316914/inescapable-consequences-new-corruption-effect-for-200-total-corruption …pic.twitter.com/So5Jh7LVNb
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In my understanding the act of abusing game mechanics for the own advantage in a way that they were clearly not intended to be, is exploiting. Stacking that much corruption was supposed to be so negative that it would not be an option. Rextroy showed how to abuse that.
But semantics... the overall message is that this kind of shit should not be possible at all. Getting 2,5k in arena by oneshotting people with a procc sgows only how broken that system is/was.