I would have thought it would be better to decentralize the ability to mass nuke so we don't have to count on a specific person being online at the right time, but hey, you obviously know more about the best set up than I do.

interesting idea but how exactly to decentralize nuking? by voting on spammer?
It is pretty disheartening to see the same names showing up again and again and again. Kind of feels like a waste of time when for every post you report the spammer makes three more.
you can write a post about with all evidences and request a mod to take action on the user
or on your report, you can state the user has spammed a lot and include all related message ids
with that kind of reminder, mods may take appropriate action: nuke or ban the user