Nope there is no option to restrict bodywriting in the restrictions menu, there is one in your characters fetish menu but that doesn't effect anything other then how your character reacts to it happening, the option in the performance setting only hides the visual words appearing on your character not the act of bodywriting occurring and the dialogue that follows.
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Interesting, apologies for the inaccuracies! This will likely have to be elevated on the issues or suggestions on the Github page for it to go anywhere. Rahi appears to be rather busy so it may take some time to be addressed if at all. Alternatively, a modder could edit the content out of the game if there are any willing to take on the task.