Good or bad graffiti ?

Now some people would argue that there is no such thing as good graffiti, but I beg to differ. I agree that pointless name "tagging" and offensive gesturing have no worth in any way, however, when it provides mirth in an artistic temperament, it rocks. The photo above is , to my mind, a classic piece of inventive wit. I have always been able to identify Flemish architecture by its curves, so to highlight this in such a way is most amusing. To the passer by it is almost invisible as graffiti and strikes more as a compulsory notice than an observation. I have seen several other pieces of this work, around about, and shall endeavor to post them on here as I find them.