On Mon, 23 Apr 2018 20:54:35 +0100
Andy Burns wrote:

I assumed it was fictitious, it's not on NIN's list of ~25,000 groups.

Probably one that was auto-created by a posting to a dodgy server that
does that sort of thing ("subscribe to our great service - we carry
three trillion groups") and maybe propagated to others that aren't very
well run. NIN seems to be well run.