Don't spend a minute on fixing them if you don't want. Read all the ones you get. If any of them are accurate enough for you (whatever percentage that may be, it's obviously a subjective decision), post them. Don't post the ones that aren't accurate enough.

If none of the submissions is accurate enough for you, then don't post any. All you're out, the only downside, is the time it took to just read them, which isn't that much. The upside of course is having an faq you feel pretty good about.

p.s. I know there is a hidden downside, people will say "hey, why didn't you post mine?" and you'll just have to say it wasn't accurate enough, but thanks for the effort. Saying that's what you're going to do upfront, now, means it won't be a surprise later.