I hope its not weird that I've never heard of Wikitravel. However, I think its a fantastic idea! For so many people, travelling is an interest and something that a lot of people spend a lot of money and time on. Because going places that you've never been can be somewhat risky and you don't usually know 100% about what you're getting into, most, if not all, travellers like to research places they want to go and get as much information about it as possible. Wikitravel is great because instead of spending money or travel books, or sifting through thousands of google search pages, you can get the information and opinions you need from people that have been there conviently all on one site!
I thought the policies section was vague and not very helpful. You can't really made set rules in this kind of online community because it's a little hard to control. I liked the goals and non-goals better because it really explained what the site is all about and what wikitravel wants to see in reader articles.