So its ok to take portrait style photos of people without disclosing the purpose of them, including commercial usage? (ie a published book)
I understand the situation if you are taking photos of people in a public place, where you are snapping them going about their business - thats a little more clear cut in my mind, but surely if you are asking them to pose for you in a portable studio you should be up front about your motives?
Ok, so I (as a photographer) would have asked for what the purpose was, but clearly it wasn't freely offered...
I didn't say it's okay! Just not against the law. Moral right and the law are miles apart in a lot of ways, which usually results in a civil action if you want to take it further. There are relatively few specific legal dos and don'ts and it's often left to juries to decide if any injustice has been done.
It's difficult, with indecency for example. Indecent photographs are illegal, but what consitutes indecency varies widely and changes a lot with almost every case, as happened at the Tate only a couple of weeks ago.
But aside from any specific laws, truth is pretty much an absolute defense I think. Has the person in question been misrepresented in any way, or been harmed or diminised or lost income etc by this publication, or by the context? If not, what's the problem? The fact that somebody else might have profited from it is irrelevant, unless a jury sees this as some kind of unfair exploitation.
From the circumstances it sounds a bit like this person feels conned in some way by the photographer not being upfront. Possibly, but often when pictures like this are taken it is entirely innocent and the subsequent 'abuse' (if that's what it is) is only apparent later.
For example, I had an 'amusing' accident on honeymoon and the story found its way on to the front of the local paper, accompanied by a photo taken by one of our guests. (I got run over by a speedboat, and had my arse ripped to shreads - yeah, very amusing

I even made The Sun

Now stop sniggering

) But it was a photo of me, at my wedding immediately before the accident, all of which was true and public knowledge. I didn't particularly like being on the frigging front page but how had I suffered by this? What had I lost? Why should I be allowed to stop a story of (alleged) public interest? How should I be compensated? It happened, it was true, and that was that. I got over it.