Just rereading the manga and stumbled across this page then decided to make a thread on the numerous symbolic references of the moon in the manga.
And last but not least:
It seems to me that there is a connection throughout the manga with violence, the mangekyo sharingan, and bijuu all tying into the full moon some how. Perhaps because of the sealed Juubi? Im sure there are plenty of others i couldnt remember i just find all the symbolism with the moon to be very interesting.