I've actually been in such a situation before, and experienced all the emotions mentioned in this thread. An auto accident happened right outside of my workplace a few years ago. I did take pictures. No one was hurt, and the aftermath of the accident was quite funny. It was a visual pun on the words "bus stop." Click on these links to see what I mean:
http://users.2alpha.com/~pklein/temp/1864Small.jpg
http://users.2alpha.com/~pklein/temp/1865Small.jpg
The person in the second picture is the tow truck driver.
The driver of the VW bus told me (a bit beligerently) that I couldn't take pictures. I told him that this was a public street, and I had every right to do so. Later a policewoman asked me if I was with the media, and I said no, but gave her my number in case they wanted copies of the photos. They didn't, so I suspect they took their own. I did submit the pictures to a local paper, and they were interested. But it was not a slow news day, so they didn't make it in.
Now, the interesting part of this was that my "photojournalist instinct" kicked in and I took the pictures. But I felt a bit sleazy doing so. I felt bad for the driver. But I also realized that if he had veered a few degrees more in one direction, he would have ended up crashing through a window into the office of a colleague--a person who I like very much, and often assist with computer issues. She could have been turned into hamburger. Or I, or anyone I worked with.
Or, what if there had been people waiting at the bus shelter? There were some good reasons to take the pictures--legal, insurance, photojournalistic. When the driver told me I couldn't take pictures, I became more determined to do so. If he'd asked me politely, I might have complied.
Even so, I pixellated out the license plate before sharing the pictures with other photo friends. I eventually took down all but the above two shots, which make the "bus stop" visual pun without personally identifying information.
Had there been injuries, there would have been more reasons
to shoot, but also more reasons
not to. I don't know for sure what I would have done, but probably just helped my injured colleagues if I could. Life and limb are more important than a few pictures.
I can really relate to Melanie's remark about deciding against journalism as a career. I used to write music and theatre criticism, and I
hated to give anyone a bad review. Schadenfreude is not my idea of fun. To some degree all journalists prey upon others' misfortunes. We need them in a free society, and yet they often must do things that a nice, polite person would not. This may be one reason why many people dislike and distrust journalists.
--Peter