A few weeks ago, I caught Ty grafitti-ing on my bedroom wall. After I scolded him he said, "I'm sorry, Mommy. I did it over there too." And my other wall looked like this...
I asked him if he did it anywhere else and he took me to his room where he had colored on his closet door, bed and toybox. Luckily, all this was done in a washable crayon, so it turned out not to be too big of a deal. At least he fessed up to it...