"Ceterum censeo Carthaginem esse delendam" or in English "moreover, I consider that Carthage should be destroyed" was a popular phrase among senators who considered peace with Carthage to be impossible. Its most famous user was Cato the Elder.

It gained in popularity after the second Punic war wherein Carthage had gained a reputation of being a persistent warmonger.

The phrase was uttered at the end of every speech, regardless of the topic. The purpose was to reinforce the idea and emphasize its importance.

It's not quite the same thing, but graffiti was a reasonably popular pastime for Roman city-dwellers. I'm not exactly an expert, but apparently acts of written graffiti would have strings of thematic similarity frequently enough that someone wrote a book about it that I haven't read. Scholarly reviews say the book is quite good, though. Pictorial graffiti was fairly common, and a quick GIS for "roman graffiti phallus" will demonstrate that showing strangers pictures of penises is hardly a 21st century innovation.

The graffiti "OPPI, EMBOLIARI, FUR, FURUNCLE" is even eerily similar to Redditors making clear their displeasure with the original poster.