I'll just add that, players are not like server where they could stay online for quite long time after a shame topic is made against them.
The server/GM HoS could warn potential players who do their research before trying a server what to expect if they happen to be interested in the server posted. As for a HoS for players, it is hard for a server to stop unwelcoming players to join their server. In-game name and IP could be changed and impersonated easily, it will cause more confusion or unnecessary hostile on wrong players if handled incorrectly.
I will move this to the suggestion section for record.