Its stupid to pillage golden mines.You just cut your oportunity to get allways gold from there.And forever there golden or not player,by pillaging you get - honour points.Its very easy(- honour points) them to get at the begining and then to hard to get in to +.
i have +300 honor
and whenever i will need honor i can just crash someone
and about "cutting my opportunity to get always gold from there" theres a lot of goldmines,you cant even imagine it so i aint loosing anything
i always have few goldmines i only siege and rest i pillage
after all my goal aint get gold but be marshal pillager