Comment mods
Currently 99.9% of comment moderation is done by mods (the other 0.1% is autodeletion by enough user flags). Other than flagging there is no way to moderate comments unless you are a mod. Every once in a while I catch arguments that get out of control in comments on SO and all we can do is flag and watch and hope a mod sees or it gains 3 flags (assuming it does not match the list of 1 flag deletion). If this is implemented it would make this situations end a lot faster due to the comments being deleted a lot faster.
PeopleSomeone would getbecome a comment modsmod by being appointed by staff and/or mods of a site mods.
Very heavy inspiration from this answer.