You are DEAD to Me.

Photographs are moments that are forever frozen in time. So it follows that defaced photographs are those frozen moments that have been stabbed repeatedly with an icepick.

Some collections of intentionally defaced photos:

From Square America


From Flickr's Defaced Photos (Vintage) group


It must be some sort of trend....the Peabody Essex art museum in Massachusetts currently has an exhibition running through January of '08 entitled Accidental Mysteries that includes the above photo, "Cut Faces".