I would say it depends entirely on how the people involved wish to take it. a month ban might not be enough depending if they only play once a month. i would say a three game ban sounds fairer but its the site decision. if the players arent complaining and its has been resolved then obviously they are happy with it.
If someones being a dick then just keep reporting them to the marshals, being aggressive to them only gets you in trouble as well. its only a game guys dont be COD softers screaming down the Mic at people.