[FreedomCalls]

I remember reading about how archaeologists found graffiti amongst the Greek and Roman ruins.

Here's a bunch more: http://www.orbilat.com/Languages/Latin_Vulgar/Texts/Pompeii_Graffiti.html

Samples:

Celadus the Thracier makes the girls moan!

Profit is happiness!

I've caught a cold.

Caution. Some are quite bawdy.

[R. Scott]

Caution. Some are quite bawdy.

Along the same line, I once came across a reference to the sandals worn by some prostitutes – they had advertising cut into the soles of their sandals that would leave their name and address in their footprints.