Removing Bribery?

I've just about modded my RTW game to where I like it, but I'm getting really sick of my hard fought cities being bought by rich enemies that I'm not even fighting at the moment. Is there a way to just drop bribery from the game, or make it more difficult/expensive to where I'm not losing a city every couple of turns? I've tried assassinating every diplomat that wanders into my provinces but it just gets old.

Removing bribery? Delete all the diplomats! ~D
No, seriously - Maybe boosting public security values of buildings? Not sure wether public security helps prevent bribery.

/data/descr_character.txt file:


Go there look for the diplomat and delete bribe.

it works but I don't think it works on saved games

I was going to say that Oaty, but I wanted some money for doing so first. How much did he pay you? ~;)