Only sometimes?
The funny part is that in Arabic script that squiggly line really DOES read as "Mohammed"! The interesting question: was it put there by sheer accident (sort of like the face of Jesus on a piece of toast) or was it intended as a message to subliminally propagate Islam? That it was consciously done as an insult to the bas****s seems the least likely possibility. However, this would be a collectible:
Mohammed .. Mohammed .. Mohammed .. Mohammed
So does the 'signature' of most doctors on a 'prescription'.