The hunter Gunslinger exploit should be a bannable offence because the play is knowingly use a bug, glitch, whatever you want to call it to gain and advantage over the other players in game. To me that the definition of cheating therefor bannable.
Edit: This community is one of the worst communities ever. "Oh let use the broken game mechanic to our advantage because we suck at the game and can't play legit because we are horrible people"
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Get a hunter and adapt