There is a big plus side to that type of street art. The area below the San Diego side of the San Diego to Coronado Bridge was plagued with gang graffiti which looked terrible and also was the rationale for many gang fights... One gang over writing another gang's graffiti emblem.
The Hispanic Community and the San Diego City Fathers made the area beneath the bridge into a park called, Chicano Park, and invited Hispanic artists to decorate the bridge columns with Hispanic related street art. The result was "Chicano Park" with no more gang graffiti marring the columns.
https://www.google.com/search?q=chic...=2560&bih=1334
What about the other (Coronado) side of the Bridge. It's a night and day difference. San Diego side is Barrio Logan, one of the poorest areas of San Diego. The other side is the City of Coronado which has the one of highest average annual income levels in California