"I promise to review (kindly) every fanfic I read whether it be fantastic, useless, or anywhere in between. I make this pledge because I know how frustrating it is for an author to have hundreds (or thousands) of hits and only a handful of reviews."
I am an avid reader of Harry Potter stories. I do not have the knowledge to declare this is good writing or poor writing. However I can tell if I enjoy a story or not. I will try to keep my reviews positive or at least keep any negative comments in a polite and helpful way.
I abhor authors notes that are trying to defend their story. People can cruel to author over little things. I say ignore them. It is your story write it your way.
To all Writers: Thank you for sharing your, time talents and imagination with us readers.