@meetdilip: Yes, of course it depends on the different sites. It should be an optional, configurable feature. Since it seems to be not yet implemented in NodeBB, I woud like it to be considered a feature suggestion.
About choosing Discourse or NodeBB, Discourse has already very nice features like this self-moderation. However, for some other points that can be important depending on the site, NodeBB gives more options. For example, Discourse has explicitly discarded pagination as a possible option, therefore infinite scroll must be used in all cases. Also adamantly discarded are hierarchical categories, and only one level of subcategories is allowed in all cases.
On the other hand, NodeBB seems more open to give options for users' suggestions, such as optional pagination, unlimited subcategory levels, flexible theming, etc. So, this project probably will use NodeBB.
Hmm... there's always /nickserv identify, but I have absolutely zero idea how that even works.
What if you made your own bot that listened for private messages from users, and verified them? So all I had to do was /yourbot julian hunter2?
Then your bot would probably communicate with a companion plugin on our end to verify users by username/password... There's a possibly MITM issue present if you don't use HTTPS though... less so if everything is on one machine and you're communicating via localhost connections...