Hread needs to go, because the purpose of the NightWatch is to alert the watchers to troubling threads and leave them to get on with whatever actions they could/should take (presumably within standing orders from MNHQ.
The public nature of the board (as mentioned by LEM) has caused discussion on whether it actually works (remember, but can't find the thread about it, and this may be gone by the time I've searched).
It's not a big problem for overnight spam (and they zap a lot) and silly OTT trolling. Not so good for this. I hope it'll be one of the angles at MNHQ will be considering alongside the other issues.