>> Is forums.debian.net linked to Debian or is it some kind of scam using >> "debian.net" to confuse the user into thinking it's legitimate? > forums.debian.net is administratively controlled by the Debian > project; see <https://wiki.debian.org/DebianNetDomains>.
Having spent more time around it, and recovered from my frustration, I can confirm that it seems very legitimate. [ And I finally managed to register, after finding the fault in my human reasoning (I stupidly hadn't noticed that there were more fields to fill beyond the bottom of the window. I guess a bot wouldn't have made that mistake 🙃). ] - Stefan

