The best wall writing is great art and is routinely destroyed on sight, the brainwashed smile, and official art prospers. A cultural war is raging. Mt. Rushmore is a tremendous turf tag. Television and billboards write on children. Joe Camel, a fictional creation that peddles poison, has enjoyed more rights to urban space than all the eight year old taggers combined.
Children find ways to write back at society.
This person would share more in common with the modern wall writer than with the typical rock art fetishist. Most graffiti hides from mainstream view in alleys, tunnels, and abandoned zones. The very intensity of law enforcement spurred new peaks of calligraphic virtuosity. Like modern Homers, great rappers create powerful rhythmic rhyming verse on the fly. The superman of the future is likely being selected for in some third world hellhole and some sort of tag culture is likely to be an early media signal.