I can appreciate the position of the moderators who have to sift through dozens and dozens of posts each day and the burden of pointing out to every rejected poster the line their submission crossed. They are certainly justified not wishing to invite on top of that load potentially heated and fruitless debates over the rules , their enforcement, interpretation or other technicalities.
But, writing as a well-intentioned, but not necessarily savvy writer, I think I could benefit from the constructive feedback. At the very least, I could distinguish between rejected posts and those that never even got through due to some browser hiccup on my end.