Again, I refer to 'Pulp Fiction' and the like. Quentin Tarrantino seemed to have no problem inserting it and let's face it the film is a classic. That's just an example since I've seen it. Am sure there are more. So in the right context why shouldn't it be used in writing, fiction or non-fiction?
I'm not arguing for censorship regardless of context, but what to you is 'the right context'? Here you've justified its use because it's 'part of a classic'?
That's the sort of 'films are for fun' liberalism that bought Tarantino's repugnant
Inglourious Basterds a critical pass too: because that was so funny and cleverly put together, a good majority of its audience didn't seem to care about its bankrupt approach to history and Holocaust representation.