This is a much bigger problem: Bitcointalk in general is very unfriendly to Newbies! It was already like that when I joined, and in the first years I was afraid to get a red tag for some unimportant tiny mistake.
The problem is not in the forum and most of its users, but in the fact that there are certain users who are very easy on the feedback trigger, they have been doing it for years and no one can do anything to them, and they are in the DT system. Therefore, I would not agree that the forum is generally unfriendly to beginners, in most cases they are their own worst enemies because they behave irresponsibly, do not read the rules and try to progress easily using plagiarism.
If an user threatens another user (especially a rather new account) with getting him banned... is that OK? Or, better asked, should we do anything about it? (report or anything). Is a new (unofficial) rule needed?
Since we know these are empty threats, new users need to be explained that banning is not something anyone can do, and then these bullies need to be left with neutral feedback. Anything more than that is not worth any drama and time.