I gather the least amount of information needed to serve your page. This site doesn't have a web tracker or other external resources. We don't have advertising.
I do have a mailing list but if you don't subscribe to it, I won't have any information about it. I also don't require anything to join the website besides your email address. Since I don't personalize anything… I don't need it.
Also, all of the data can be found from Atom feeds so even if you want the information, you can do it in an anonymous manner.