There’s a grease monkey script that will block the call. It’s happening in your browser after text completion.
But realistically they could mod forcibly on their end if they really wanted to, only issue is API use may run into issues where a legitimate use ends up getting stomped by moderation.
That's why it's honestly just better for them to make moderation optional, they should have a button for it in CGPT interface just as Google has "safesearch on/off".
Because of the way it works they can fundamentally not prevent it from producing explicit, violent or adversarial output when someone is focussed on getting it to do so without removing the very magic that makes it so good for everything else. So they should stop trying already, like damn.
(And 'they' here might mean the company as an abstract entity, or perhaps just the engineer put in charge of implementing this feature?)
There's a browser plugin called DeMod or something that disables it but I don't know how well it works.