If you read someone's story you shouldn't be afraid to leave praise or constructive criticism. I did on most of the stories I've read. Constructive criticism will help a struggling writer like myself improve. You don't have to be nasty. Just point out things that you think help, too wordy, sex scenes not graphic enough, unbelievable story line ( if not sci fi or fantasy ). I don't know about you but I'm not whoring myself out because you threaten to post a nude selfie of me...but that's just me. Some well meant criticism will make for better reading. You can do it anonymously if you wish.