When you register on our site (discourse.pi-hole.net), your name, e-mail address, and IP address are stored in order for your account to function. This is a mere function of the software.
Beyond what Discourse requires, we do not actively collect any other information. We designed Pi-hole to block this sort of thing, so there is no relevance for us to collect it.
No, we designed Pi-hole to block this sort of thing, so we are not interested in collecting it.