To the bolded: If that's the case, I really don't understand your point, Ron.... I'm saying that in a sincere way, not in a bad way or anything. If you don't like people to nitpick or post negative stuff, then wouldn't that imply you want people to either post positive comments or not post at all? That's how I interpreted it. If it's wrong, I apologize for that.
As for the frequent "culprits", if you're really annoyed with them, I would think that the best (and perhaps only) solution is to put them in your ignore list. Or you could just skip past their posts. It's rather unfair to put a blanket "dislike" on any remotely negative posts, especially to new members or people who hardly posts, just because of the post history of a select few old members. No one here is going to like everybody's opinions and posting style. I have my fair share of frustration reading CF sometimes too, but at the same time, I'm sure my posts can sometimes be annoying to another member as well. That's just how it is in a forum. And in life, basically.