“Shitposting” is hardly a nowadays thing. The romans for example were known for chiseling walls (i.e. grafitting) with the most inappropriate or pointless stuff.
There’s also some records of the exact same kind of content written in ancient nordic runes around the Hagia Sophia, like “Halvdan wrote this” without any further input, or one inscribed on a tall and seemingly inaccessible corner of the ceiling, that mystified scholars for decades, until it was finally translated into “This is high”.
MonsterTamerBilly