Though Jay says he's not a professional fiction author, I think he does very well. And I, too, have received my share of stupid and unhelpful troll-ings. Though I am not a professional fiction author, I think that I've published (and been paid for) enough to be considered a professional author -- of non-fiction, of translations, etc.
I've appreciated comments from many readers; but the number of semi-literate effusions has waxed over the past decade.
If you can't say something constructive, try to restrain yourselves.