Etiquette on leaving message on old or finished stories

wonder what it is, i know a lot of people get snarky for bringing up old work on forums but this is a posting site not a forum....that also seems to have a forum that people post stories extra in...

but would writers still enjoy a little message as i read along each chap, even on 10 year old work? like "i think this is going to happen, i hope this other thing dose not.' or just get to the end like a book.

i would still like to avoid the queen nazi, there is always someone who cant control there ocd on a site like this