I play Conquests with NoAIPatrol=0, so my barbs roam around. Barbs annoy me; I don't go looking for them, and it's a nuisance to keep enough military to defend against them with slow units while trying to expand and build a road network. In my last game I noticed something that should have been obvious from the start. I started near jungle, which usually is a start I hate, but this game I aggressively settled the jungle and--by accident more than by plan--settled from coast to coast very early and had a single front line to the rest of the continent. The barb angle to this is that the barbs couldn't pop up behind me; they popped up between me and the other civs, and the AI civs went and slaughtered them before they could come and bug me. Also, I didn't have (Emperor-level) AI troops meandering through my empire to pop a barb camp while the barbs harass my workers and paper-thin early-AA defenses. So next game I am going to look to try to settle so that I don't have a dark flank barb camps can spawn in, so I have a single united front against the AI and any barbs that find me before the AI finds them. The first problem I can think of is where there is tundra at the coast. Tundra is just not a good place to waste a settler in the first 80-100 turns.