I can't seem to find the photo to look at it, but if PPs are correct, it's more in the vein of a picture of him and his group arriving at the scene, not a picture of the deceased or the families. Not rude, and not rude to make it post of the day--it was what he was doing that day, after all, and probably the most significant event of the day.
ETA: Thanks for the link, Winterlight. Looks like they were careful to not photograph anything they shouldn't have.
It's an interesting bit of technical protocol, actually. It doesn't sound like the families were asked and couldn't agree, but instead that due to the circumstances it would not have been correct to allow any particular one of the families to request media.