But it's utterly inefficient to use coder time to manage web content. That's why the best idea is to create a block by block content editor with textareas or severally limited editors that remove and reformat HTML that's being generated. I've seen good results thanks to this.

I agree though, whenever I included a full WYSIWYG editor to a CMS the end users created unimaginable havoc. "Hey it's Word, I know this".