What if I run something like a good old phpbb just as a hobby. What would I put on that privacy page? You enter your email address on sign-up. It's visible in y

What if I run something like a good old phpbb just as a hobby. What would I put on that privacy page? You enter your email address on sign-up. It's visible in your profile. You get notifications to it if you subscribe to topics. Isn't it kinda obvious it is stored? What if phpbb logs IP addresses for every post? I know it did in the past and don't remember there being an option to have that purged after a given amount of time. Can I do that? Do I need to put an imprint on the page, or is a contact form enough? Maybe I don't wanna put my name and address openly on the web. So I guess I'm just way to afraid to host a forum in Germany for my local sports club, because I don't wanna get hassled by lawyers who made this their business model. Better open a Facebook group, this is certainly much more privacy friendly.