I've a quick/easy question for experts out there: does the AI get any benefit from Open Borders with my civ in terms of gaining a view of what I'm doing? Let me explain: there's a civ that often goes to war with me. At some point between wars, they ask for Open Borders. If I give them Open Borders, will they gain some advantage for the next war by being able to roam my borders freely (and not just to "get to the other side")? I ask because I've been refusing Open Borders to past war opponents for fear of giving them some knowledge that they don't have with closed borders. But then, I'm not sure whether it's worth it, since it tends to just anger them anyway and there's always espionage for them to view my lands. Yes, I generally suck at Civ4, but I love it anyway.