Like I said it is all about common courtesy. I am NEW to trek lit and have not read many of the books yet. I enjoy these forums because they give me insight on what books to read.
I am certainly not saying I expect nothing about these books to be discussed at all. That would be silly but if there is some major surprise or moment in the books I would hope no one would intentionally spoil me. Just because something has been out for a long time doesn't mean everyone has experienced it. There shouldn't be a time limit on major spoilers.
Now I don't even know if there is anything that would constitute as a major spoiler in Trek lit so maybe this is a non-issue.