Noone is required to read the FAQ. You end up in the FAQ if you ask an unrelated question and users link to it, or if you are curious about the little link in the top row. Nowadays noone, with respect to those who do, reads the manual until something goes wrong.
Actually, it's almost better if you don't have to read the FAQ at all and instead find the site so intuitively to use that having questions like learning about how the reputation system works or how you can ask a question is already answered before you read about it.
Perhaps instead of making users read the FAQ, we can focus on why users don't follow the FAQ in the first place, and discuss improvements on the part on the site that users find dubious in regards to the topics discussed in the FAQ.