I'm sure there is some term for it, I do it at work all the time. For me, if management won't listen to a concern I have about a procedural loophole, I will openly and aggressively exploit it until something is done about it. I'm definitely morally in the right in terms of my intentions, as it's only ever to do with safety or shoring up potential for genuine breaches in security, but I would concede that my way of doing it is probably annoying as fuck and disruptive.

But the alternative would be going over everyone's head and snitching to the government, so I think this will be the way I do it until my plan to purge all of the useless middle managers has come to fruition.

Anyway in terms of a bug in a game, if the bug is ruining the enjoyment of the game and allowing people to have an unfair advantage by exploiting it, then it would be illogical to ignore the bug and play without the advantage, never knowing if it would be fixed.