Self-aggrandizing graffiti is not new.

I’d encourage you to look into the long-standing practice, it’s fascinating. This article has some insight in what was found in Pompeii—https://www.theatlantic.com/technology/archive/2016/03/adrienne-was-here/475719/. Pompeii is such a great source because it was frozen in time; samples weren’t selected and passed down. The trashy bits remain.