This topic is as old as computer sims. There were always people accusing others of cheating when they used external views. I can vividly remember the heated discussions on the GPL forums that the devs should remove the chase view from the game. Mind this was the one and only way for some people to get acceptable framerates and situational awareness.
I would say: ignore. When people are forcing a decision onto themselves, they have a nasty habit to attack others who do not.
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