Is it unilateral? Aren't there unwritten (or maybe even written) rules about who gets to tag where, how long it gets to stay up, etc.? You don't hear much about

Is it unilateral? Aren't there unwritten (or maybe even written) rules about who gets to tag where, how long it gets to stay up, etc.? You don't hear much about territory beefs these days, so I would think that some sort of agreement or code of conduct reigns in most areas, in order to prevent conflict.