A fascinating session at last year’s annual meeting of the Society of Biblical Literature (SBL) in Boston was dedicated to graffiti, especially early Christian graffiti in Izmir (ancient Smyrna), Turkey. But what counts as graffiti? Does the word “graffito” imply something clandestine, something possibly illegal, like the defacing of a building by modern graffiti artists in major American cities?
http://www.bib-arch.org/bar/article.asp?PubID=BSBA&Volume=35&Issue=03&ArticleID=05