The game will not be “destroyed” by its community. It could become less reputable,but destroyed is a little harsh. I honestly think that a game is more likely to be forgotten then to be actually destroyed. The danger that faces most games is a shrinking player base compared to a toxic one (ex : MOBA’s). Ofcourse,a negative player base might repel some new players from joining,but I doubt it’ll make players actually avoid a game.
In general MMORPG’s have different impact on people depending on how they want to experience it. Some might be doing it for the actual role playing aspect of it by taking a class and enjoying the overall content of the game. Some might enjoy the social aspect of it and stay for that reason (maybe even socially roleplaying which is also quite common in MMORPG’s).
However,if your actions negatively impact the game experience of other players that are just experiencing the game in their own way, I’d argue that you should alter your way of playing the game. If the only way to properly enforce them following basic morals is by punishment then so be it.