I strongly dislike 'taggers'.
No, really. I understand some folks consider it art. So let the artists make their own concrete walls and tag those.
Then sell them to the art connoisseurs.
Teens arrested for tagging retaining wall
By Eva Ruth Moravec - Express-News
San Antonio police arrested three teens who were caught tagging a retaining wall just north of downtown late Saturday night.
Juan Jose Zuniga, 19, and Sergio Zuniga, 17, are both being held in Bexar County Jail on $5,000 bond. They both face one count each of graffiti from $1,500 to $20,000. A third teenage male, a juvenile, also was arrested, but his name was not immediately released.