Exorcist, The Easter Egg - Hidden Grafitti

Towards the very end of the movie, Damien, the priest throws himself (or is thrown by the demon) out of a window. After he is thrown out of the window, the scene is shown of Damien, the priest, lying at the bottom of the set of stairs locatd just outside of the house. When this scene is shown there appears to be some grafitti, in red, written on the lefthand side of the stairs. the phrase is cut off but the word "pigs" is clearly visible on the cement beside the stairs. I believe that this is a reference to the bible. In Matthew 8:28 Jesus casts out demons from two men. These two men were said to be so hostile that the people of the town could not walk by them. When the demons speak to Jesus they beg him to cast them out into a group of pigs so they would not have to go back to hell. This is very close to what happens in the movie. The demon is cast out into the priest, then the priest is thrown out of the window. He then dies so the demons do not go back to hell. The phrase might be a coincidence but based on the religous criteria of the movie i doubt it. Also i would think that if they didn't want the grafitti there they would hide it somehow.