I think it all depends on how fitted the thread it is for the beginners. If the thread's like a common knowledge for the members, then beginners. But if it's new or it concerns the welfare of old and new members then meta would be the right place to go.

Edit:
I'm ignoring posters who start threads with all caps titles this is the thread isn't it?

Sorry but i do agree for it to be moved from meta>reputation since it doesn't really concern the forum per se. But more like a personal public announcement from you that would affect other members reputation to you.