Someone in the UK did this years ago, but they painted rather cruder designs around the potholes. Naturally, the media dubbed them 'Wanksy'.
This was exactly what I thought of when I read the headline. Very amusing at the time, and it somewhat unsurprisingly was effective.
I lack your laudable sense of decorum, so I'll post the link...
https://www.cbc.ca/news/trending/street-artist-wanksy-spray-...
There have been copycats...
https://www.vice.com/en/article/guy-paint-penis-potholes-new...
There's also a gent in Horsham who's recently been planting flowers in potholes to draw attention to them.
https://www.bbc.co.uk/news/articles/c0mgjklmzwvo