Ah yeah, once you use a cheat code that unlocks something, it marks you as a cheater permanently unless you start a newgame. Only cosmetic cheats won't do that, like the swearing cheat. Only activate the actual cheats if you're planning on using them, otherwise there's no need to activate them. Unlocking them is perfectly safe though. Sorry if it wasn't clear in-game. D:
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Well as I said: I've done literally everything else in the game before that. All extras manually gotten with a guide, all Aces manually, all collectibles manually, etc.
So FOR ME it's not too bad, since I can still keep my trophies due to already getting all of them legitimately. But you may still wanna put in an in-game disclaimer in case someone else may not pick up on that. Probably in the menu for the actual cheats (the one where you select them, not the place where you enter the code).