Yes, having the problem with trolls is obviously understood, this is why we give you the admin the ability to "ban" a user, kill comments/submissions, as well as set any other user as an admin to police the system as well. Granted this could be time consuming for some, which is where I can see your use-case coming into play (which we will look into).

My only other question is, if "good users" are coming to your site but now have no way of participating (commenting/submitting/voting), how are they able to prove themselves and get an "invite" to participate?