I'd like to add on to this. Yes it is rule breaking as we did not authorize him to build in part of our property.
Another one I'd like to report. Grief in our nether area, around the wither skeleton farm , coordinates (-2789,90,1378). Take note, these coordinates are in the nether world.
The griefers go by the names of: marmar, LoyalxTanker and BlueJeanBaby
I'd like a request of rollback from the head admins in the said area, please. Thanks
P.S. If damage is done by a wither spawned by a player who does not have permission to destroy there, does that count as grief?