she meant that the posts about a fic should not turn into a commentary about whether or not the character should be dead in a particular story.
This I 100% agree with. I found it strange for instance that people would post opinions without reading the story. Regardless of going off-topic, shouldn't the beginning point always be the story?
Commenting on the structure of a story (anything basically that the writer can't change). It's not even the most interesting kind IMHO. I mean if a story is of a genre that someone doesn't like then chances are the reader won't be paying attention to the story, being too up in arms about the fact that he or she does not consider the genre their cup of tea.
Lastly, I feel that debate shouldn't be about convincing so much as about dialogue. Another reason why comments such as "this wouldn't happen" seem rather asinine to me. What's the point of something like that in a fdk thread? All it does is cause tension for the poor writer.
EDIT: I wasn't referring to plot holes or small inaccuracies which are helpful, I'm referring to when someone attacks a specific premise. If that's the main plot, there's little to gain by complaining to the writer about it. Keyword: constructive. Sorry if I was unclear.