Let me get this straight? Because something (e.g incest) is morally wrong, it should be avoided? Hmmm? There are quite a few things that are "morally wrong": rape, pedophilia, murder, torture, cannibalism, etc. etc. All of which have been written about, discussed, dissected, fictionalized, etc. throughout history.
So I still see there should be no topics off limits here. Just because you write about incest doesn't mean you agree with it personally. I do try to separate the work from the person, thank you very much.
Maestro, anytime someone misrepresents what I write, I will not hesitate to dress them upside and downside. So please read very carefully:
The question in the OP was: what would you avoid writing about? And my answer was that I would avoid writing about incest.
And then Kuwis asked: what is INTRINSICALLY wrong with incest. And I replied with my opinion of what is INTRINSICALLY wrong with incest.
Now, as for my response to the post by you that I have quoted....
I have no problem with other people writing about incest--let them. Their choice. But my choice is a big fat "No."
Meanwhile, I make it a habit (especially in screenwriting) to very strongly warn other writers AGAINST ever trying to JUSTIFY incest in their writings (especially film scripts), because ultimately there is no justification for it or allowance for it or tolerance of it found anywhere in human society. If writers (especially screenwriters) want to TRY to somehow come up with a story idea where incest is justified, they will probably fail, and that is why I try to explain why they will most likely fail (espeically screenwriters).
But if they STILL want to try, at least they were warned. And then they will hopefully embark upon the task with a newfound soberness.
I do NOT restrict what other people write, I only restrict myself. And then I try to give friendly advice and opinions to other writers ... when they ask for it.
Please do NOT ever ever say about me: "Plot Device tries to tell other writers what they cannot write about in their scripts and novels" because that it not true.
Not.
True.
Thank you very much.