There's too many newbies and not enough mods to monitor them all (there's only a dozen or so staff) and although it's a paid job, moderators don't want to work all day examining newbies' posts since that won't leave them time for their work/personal lives, so this proposal will likely be rejected for this reason alone.
Bitcointalk forum is an organized ecosystem that grant freedom to every existing member.
And implementing this rules will diversify the purpose of the forum.