Sorry, Nitrous has no place on a racetrack with corners. I'm fine with it in the game, the more options the merrier as far as I'm concerned, there's no reason the game can't appeal to just about everyone. And if someone wants to run a circuit or oval racing room with NOS on, that's fine, good for them. But the inability to toggle it on and off makes a mockery of online racing in GT being anything close to "sim". You simply will not be able to compete without it in Open Lobbies so if you want to be competitive you'll have to put a $100,000 upgrade on every car, to do something that is about as far from "sim" in circuit racing as possible.