That is so rude

I saw this note a a local pub.  If you look really hard you can see the graffiti written in pencil on the pale yellow walls just above the note. 

The author of the note chastises the graffiti artist in permanent black marker 

It is rude to write on other people's walls. Now I have to paint this.  See.... "Everything I need to know, I learned in Kindergarten." 

I am thinking that he or she wants to make repainted the wall worth the effort.