I have even better idea - the lvl 9 Global Enchantment "Bane of Mad Castler".
(or more thematically "Sickness of the Stones" )
After being casted it randomly destroys 1-5 castles each turn of the player who currently have the highest castles/province ratio in the game during this particualar turn. It disappear by itself when there is noone left with more than 50% of his provinces castled. Any attmpt to dispel it from the player who is currently affected by it will only make it stronger.
EDIT: Actually it was only intended as a joke, but now that I think about it, I think that perhaps the idea has merit. Either that, or the idea to make temples burnable only by the special order of enemy commander instead of being burned automatically as it is now, or just aditinal rule that would prohibit building of new castle for the nation, that already have more 50% of its provinces castled. (game message: "Your nation is stragling to support the numerios castles it already has, no more can be build at this time")
I think implementation of any of these proposals in the future patches by developers, either just one or some combination of these, could solve the problem with cheezy madcastling "strategy", once and for all, or at least reduce it to the tolerable levels.
[ July 04, 2004, 22:43: Message edited by: Stormbinder ]