Saradora:
Back to the original question:
When readers respond vehemently to something I've written, I know I've done my job developing a character, a theme, et al. It also means that the person commenting on my story read the details. I'm flattered my story has been read, more so that it's commented upon. I don't write for the reader; I write for myself. If you read and comment positively or negatively, thank you for reading my work.
Well, I'd cetainly hope that the reader reaction (if any) would reflect my intentions RE the particular story I'd written. If I had deliberately described a one-side domestic discipline relationship and it was criticized as unfair by a reader, I would have to agree with that--not all spankings administered are justified, after all.
OTOH, if I'd tried to portray a caring, affectionate relationship between spanker and spankee but it was interpreted by a specific reader as being harsh and cruel, then I might want to figure out why that impression somehow was created from his/her perspective.
Of course, I do agree that feedback, whether positive or negative, is (or at least should be) valuable to a writer, and I likewise agree about an author writing primarily for him/herself--if other people (readers) enjoy his/her literary efforts as well, that's the 'icing on the cake,' which is always quite appealing... --C.K.