Are they rules, recommendations, convenient places to hold discussions? How are they to be used? What expectations are there when you link someone to a meta thread? Are meta top answers a suggestion on how the site should run? What is the expected lifecycle of meta threads and their effect on the mainsite?
For example, take the first FAQ on writing answers, Is homebrew an acceptable answer to a question? in the first answer by Brian Ballsun-Stanton
If, after well articulated research, you can reasonably suggest there's something missing for what's being sought in the originating system, and the querent doesn't explicitly forbid homebrew, you can answer with a "Your system doesn't support your request, but here is some homebrew I wrote, and here's how it played out in a game I ran."
Suppose you see a question where the top answer does not display 'well articulated research' and does not 'reasonably suggest something is missing from the system'.
Clearly a lot of people thought that was a good answer. Does this mean that the meta is obsolete, or does this mean that the answerer and everyone who upvoted the answer need to review the FAQ?
What is the best way to deal with this situation?