Close Borders Mod

[flglim8]

So I was thinking about a mod that allows you to close borders with a civ (could be only after you've denounced the civ, as some sort of "downside"). After closing borders, no unit from that civ can enter your borders (including religious ones) and also no trading routes can be estabilished between your civ and the other. This could be used to stop a civ from a religious victory and also to brake their economy (if they rely on trade routes with your civ. I don't know about the viability of doing this mod, but i think it would be a nice adition to the game. Also, i think this would generate some issues with the AI, as i don't know if they would use this feature. I am only posting this as a request because my programming skills and knowledge of the game's structure is very limited. Thanks for your time everyone.