I don't think about my writing in terms of whether or not it will "do harm" at all, though. I think about my writing in terms of "are these people believable?" "Are these people recognisably people?" "Can I believe this world could exist?"
You would be surprised how many things that are published or posted or on TV fail that test.
Re: part 2
You would be surprised how many things that are published or posted or on TV fail that test.