This system is built on learning through discovery and community self-moderation. Your suggestions (the bullet-list examples you want in this FAQ) tells the story of:
Why there is no "Stack Overflow Guide for the Absolute Beginner"
Look at your examples; They are wide-ranging and scattershot. If you think about it, this isn't really a beginners' guide, but a list of things that annoy a few seasoned users. So by time you flesh out your list to cover everyone's quibbles, you end up with the bulleted FAQ list from hell.
Let me back up a bit... In reality, HERE is the beginners' guide for the conscientious new user:
Welcome. Please read our short FAQ. Then have a look around until your comfortable with how the community and the system works. Try answering an occasional question and be mindful of the feedback you receive. Thank you.
But you've been using this system for over a year, so surely you've picked up a few great tips and observed numerous errant behaviors of the less experienced. But so have tens of thousands of other users with their similar list. So the thinking begins: "Surely, if we could just compile and commit to writing this list of all the most common foibles, surely, the unaware, unpracticed, unmindful user will consult this compendium before they err."
Unfortunately, the users who will most likely run afoul of this list are also the same exact people who will never read it.
It's actually surprisingly rare that a new users asks for a users' guide. I shouldn't say surprisingly because it's not surprising at all. The bar of entry to use this system effectively is surprisingly low. The vast, vast… vast… VAST majority of users pass through without incident. New users muddle through; new users quickly become experienced users; experienced users guide the new users… but, inevitably, a few become indignant and wish others to lament the cycle:
Why Seasoned Users Want a Beginners' Guide
To vent, plain and simple. Consider the FAQ of any forum… or any one of the numerous netiquette guides. They're huge! Here is how those guides inevitably come to be that way:
Way back in the earliest days of forums, old-timers grumbled and criticized that the new users didn't adhere to the same behaviors they learned over their years of experience. So they create a FAQ in reaction to whatever issue(s) were heavy on their mind. Newer initiates note that the FAQ is only making a small dent in the behaviors they're observing. "Surely there's a way to add to this document." So they write that up, and soon they're adding quibbles of their own. A process grows out of the effort and soon there's a whole sub-culture of watching out for FAQ-able problems. Add bullet… Add bullet… Add bullet…
Ultimately, the result of the document is to arm grouchy old-timers with written proof of their indignation; to chase away newbies by being unpleasant to them because they posted on the wrong forum. Soon, the rules that govern such places seem so bizarre and so persnickety, that the whole thing becomes unpleasant for those who — you know — want to ask questions about [subject].