I use Google Analytics for getting website statistics that allow me to gauge the popularity of content, referral information, and some basic demographics. I don't know who you are or anything about you. I get basic dumb down information. If you don't like Google Analytics tracking you, I highly recommend using uBlock - it's my personal choice.
At this time we do not have user registration, but in the future I may open it up a little and allow accounts. If you create an account, I'll end up having access to account information provided - such as your email address as it is used for notifying you regarding whatever MediaWiki does. Rest assured that I don't care about you, but what you fill in I can possibly see. Feel free to sign up some freebie throwaway email account somewhere if you don't want me to know the email. A good general rule is to not put anything on the internet you're not comfortable being exposed. If you don't want your name out there, just use John Smith or something.
That's about it. I really don't care about you or spying on you. I don't care.