Now even if the "kill griefer mode is on" the griefer will win (destroy your building). Its impossible to win against one cause he just spawns everytime and trows grenades at your bunker and spade or smg your bunker then you get out of block so you cant repair and and... all in all he wins evey time.
So Here the Solution ( in my eyes the only one that can be made and the Best one)
3 TEAMKILL'S(caused by grief) RESULT IN 5 MIN BUILD/DESTROY PUNISHMENT. ( Can be Changeable)
Fair Simple Good