Kerbal Space Program Wiki:Privacy policy
This applies for the nexisonline.net-hosted wiki. The official KSP wiki has a better privacy policy, but I don't have a cool lawyer like they do.
In short, beyond what MediaWiki collects in order to ensure you're able to log in and stay logged in (which involves your IP and probably a cookie or two), and what Lighttpd (our webserver) collects as a part of standard logging practices, I don't collect any private information. Any private information I store on my systems is not going to be shared with anyone beyond law enforcement officials with valid warrants, full stop. I'm too poor to have any leverage with anyone who's into the whole stalk-your-customers routine.
Keep in mind, though, that I can update this at any time. As a part of my effort to not be a douche to people who use my services, I'll try to keep everyone informed ahead of time if something changes. However, it's your responsibility to check this page for changes.