I agree with a more general version of vartec's answer.
Inviting people based on how they self-identify will bring in a wide variety of people (and of questions), and might even exclude others ("I have a question but I'm not a sceptic"). If you want the content (questions) to be more focused, then the FAQ must concentrate on defining the content and not the users.
Consider the opening section of the StackOverflow FAQ (and compare it with the Sceptics FAQ).
The SO section titles are a different color (blue), so they stand out better: and the title is "What kind of questions...?" (not what people).
The StackOverflow audience is described in one line: "Stack Overflow is for professional and enthusiast programmers, people who write code because they love it." The line includes:
- one subject noun (programmers)
- two adjectives (professional and enthusiast)
- one verb and one object noun (write code)
- one motive (because they love it)
Contrast that with the Sceptics opening sentence which has:
- four subject nouns (skeptics, rationalists, free thinkers, or anyone)
- no adjectives
- one verb and one object noun (questions pseudoscience)
- no motive.
As a lay person (not a professional sceptic) I find too that the terms used in the Sceptics FAQ are less well-defined (IMO everyone would agree on what 'code' is but not everyone agrees on 'pseudoscience' ... in fact maybe one reason for the forum is that people can't always tell the difference between science and pseudoscience).
So enough criticism: try to be constructive, offer an alternative.
"Sceptics is for sceptical and curious ?noun?, who question pseudoscientific claims because they want proven evidence."
(Did I get the motive right? Or is a sceptic's motive "want the truth" whereas "proven evidence" is a means not a goal? Or is "sharing" the real motive? Anyway: the above sentence is a good format/grammar IMO).
The very next sentence of the StackOverflow turns to describing the topic, i.e. the questions. Whereas the Sceptics FAQ rambles on for another two sentences, describing activities ("applying", "researching", "hear", "read", "discussions").
So if StackOverflow starts like this:
We feel the best Stack Overflow
questions have a bit of source code in
them, but if your question generally
Then the corresponding Sceptics text might be like:
We feel the best Sceptics questions
are about ?what's best? but if your
question generally covers …
- Assertions published in the media without their having referenced their
- Pseudoscientific claims which seem to contradict the general scientific
- Commonly-held beliefs for which there is no obvious evidence
The StackOverflow fourth bullet point is interesting: "matters that are unique to the programming profession": top that! Is there an equivalent summary/community for the sceptics forum?
The rest of that first section of the Sceptics FAQ is way, way too wordy (Physics, Dr. Plait, a long quote): it's a manifesto, and an apology, about, "What is scepticism". It is, therefore, off-topic (my apologies to its author for saying so): the topic is "What questions...?"
So, cut all that out.
Maybe one paragraph:
This forum isn't for asking questions about science (for example "How do magnets work?"): science questions belong on other StackExchange forums, for example the Physics and the Fitness and Nutrition forums. Sceptics is especially for questioning whether various claims are even true.
Finally invite people to look around by linking them to
https://skeptics.stackexchange.com/search (see the StackOverflow FAQ for how to do this; though you might not want to do it yet if you're not getting many duplicate questions and if a typical search doesn't return many matches in practice).
Add a link to "What are the attributes of a good question?":
Before you post a new question, we invite you to read this FAQ entry: What are the attributes of a good question? Questions which don't have these attributes are probably not answerable (cannot create the high quality answers which we require), and must be improved on or closed. If you have a question to ask here please understand how to make it answerable.
(Above paragraph might be edited for tone: a trade-off between brevity and friendliness, e.g. "which don't have" -> "without", etc.).