I used to have an old framed comic sitting on my desk. A character proclaimed "I love mankind, its humanity that I can't stand!"
That seems to be the rule here. For all the bluster that one of the G-zones will emerge to lead us and reclaim or reformat the world, I just can't recommend visiting one. They have this us or them mentality that sees outsiders as resource at best, or a public utility pipe to bring in materials and export waste.
There was this one guy I knew. Went in, and got accused of murder. Hadn't been there when it occurred, had no motive, or even knowledge that the victim existed. But when strangers show up, its time air out old grievances.
Now his experience was singularly bad, I should point out. It would be wrong to presume they always jump to that conclusion. Sometimes its a more round about path - a lot of people want to do things off the books. Not always bad things. A lot of people down in New Birmingham appreciate playing cards with people who won't rat them out to the though police for gambling. Other places will pay for an impartial arbiter with no stake to mediate claims.
Some unscrupulous individuals will ask you to liquidate a rival for them, rather than just blaming it on you.
Point is, people in the cities have an agenda. We all do. But in the zone, its make yourself comfortable, explore, find a lost relative, find a way to die with glory and honor to atone for all the friends you lost in The Event, or find the recipe for all those flavors of ice cream you recall as a kid.
City states tend to have bigger goals, and ones that need more vision to acquire. Whenever something must be pictured, there are those who thing they'll be the better photographer.