Probably not. Complete demolition of another player's cities is usually not a common feature in RTS, as it doesn't really promote good gameplay, just griefing (at least in my personal gaming experience). This type of gameplay feature is usually found only in RTS where you fight against NPCs, like in Age of Empires, or similar RTS for PC/Console. MMORTS don't incorporate complete destruction of an enemy as it does not promote the MM-part of MMO - Multi-Player.
As far as I can tell in Golden Age, there's no complete destruction of those you attack. Sorry!