Did anyone else in the Northwood neighborhood have an orange paint or powder type ball exploded in their mailbox on 9/17/11?
If so, perhaps it was because you have a reference to OU (such as flags or OU in your address). I can only think it someone who is not an OU fan.
Tampering with mailboxes is a federal offense if you get caught.
It was probably done overnight since the mail was not completly covered in orange.