Expunge Potsdam graffiti

I would really like to know why the graffiti in Potsdam from July hasn’t been covered up yet by that guy or the town. My son is starting to sound out words and when we are at the light to turn up Market street, he sounds out the word f*** to me. I almost had a heart attack and yelled at him for saying it. I didn’t know where he got it from. He cries and says it says it on the building and when I looked to my left there it was in big black letters! Potsdam better do something soon.