would the page look ridiculously cluttered and scare people away?
I'm fairly sure it would. I'm not saying the FAQ are ideal in their current form, but it is impossible to condense them onto one page.
If so, then the rules are too complicated for all but those like investing a lot in their online egos.
Too complicated by what standard? The number of things you need to know in order to post your first question is fairly small.
The number of rules and specifics that become relevant if you have a specific issue, or want to get more involved is large - not because the site's developers and the community prefer complication, but because building the site made them necessary. It's a structure that has grown over three years now and all in all, I think a pretty good balance has been struck between simplicity and the want and need for featurescomplication.
If, of course, you have a suggestion about how a specific feature or area could be made more intuitive, absolutely feel free to suggest so, of course - good and new suggestions are definitely noted by the community.