@zandertrek Well, I think the big win here is to stop them before they register. Afterwards is a bit late in the game, no?
Another boon to registration queue is ... I currently have a current registered user. And three additional attempts to register again under different email addresses, i.e. sock puppet/troll accounts, from same IP address. Maybe I should okay those? Ya' think? Naw... sorry charlie. 😉
There are several nice "knobs" to tweak in NodeBB, which, cumulatively, make a fairly nice layered onion. That this stuff is modular is a boon to admins: we can pick and choose what is most appropriate for our site. One size fits all approaches suck.