Paranormal phenomena may have a tendency to be under-documented, but that doesn't mean content can just be written without any sources to back up those claims. Doing so is understandable when making stubs, but in fleshing out an article, one should try as hard as possible to find at least one source for each claim. Even references as trivial as a blog post by a professional or well-known occultist can do, though ideally sources from books or even universities or governments should be used.
When in doubt, follow the rule of all wikis: Be bold. You may be the only one motivated to make that change or create that content, and we'd be remiss to not have your contributions.