ST
From the report, the Tornado was doing "IAS of 434 kt". I don't think that an incoming projectile with the frontal area of a Tornado would have been visible to the Cessna pilot, so whether he was taking pictures at the time is IMHO immaterial.
In reality this could happen to anybody. A 100kt plane with a human observer in it cannot take avoiding action in time against another one, head-on, doing 400kt. It was the Tornado pilot's fault, if anybody's.
So this example proves exactly nothing at all.
As for taking pictures while flying, I once filmed the entire coast of Spain from Malaga to Alicante while flying alone (on autopilot). Perfectly safe. I could have stuck the camera onto the window with suction cups.