No, but everyone needs to know where the line is... Its part of judging the incident when you arrive and assess the situation.
You yourself agree its distasteful. Out of interest, and not to judge you personally, but would you have carried out the same actions as the guy with the videophone (bearing in mind he didnt even know she was an upcoming ballet dancer?)
Well, we're still not entirely clear
what actions the guy with the videophone took...however;
I am a press photographer, 95% of the time I have a camera on me...that's my job. If I happened to be walking along and saw this incident, I would make sure I had my Press Card visible, and take some shots of the scene, carefully trying to avoid making anyone recognisable. I go for two "categories" in these sort of situations, think of it as NSFW or Safe.
Safe shots would be the sort of things such as, general police car/ambulance shots, cordon shots, bus shots...something that illustrates the scene. Depending on the prevailing mood (ie. am I about to get my head ripped off by the general public) I
might go for something which illustrates the story better than a shot of a bus. Perhaps a shot of a bus with paramedics near it. Difficult to judge without having been there.
As you said, he didn't know it was an up and coming ballerina...it could've been Kate Moss, Boris Johnson, Nelson Mandela or Lord Lucan hand in hand with Bigfoot and the Loch Ness monster. If I didn't know who it was, I'd be doing my job...ironically, if I DID know it was a small child which as you said probably isn't "hard news", I'd be less inclined to do so.
If I'm in any doubt, I'll get the shot and then make a journalistic judgement on whether it gets submitted.
Does that make me a horrible person? In your eyes probably yes.
Am I doing my job? Yes.
Do I always enjoy my job? Tell me anyone that does.
Just like any job, journalism has it's dark moments...ask any reporter about their first "death knock".