"To photograph people is to violate them, by seeing them as they
never see themselves, by having knowledge of them that they can
never have; it turns people into objects that can be
symbolically possessed.
Just as a camera is a sublimation of the gun, to photograph
someone is a subliminal murder ..."
-- Susan Sontag, On Photography, 1983
Just to start with, regardless of that particular photograph, we do have to be very careful to respect the people and other subjects we photograph. The very act of arrogance in photographing anything leans towards disrespect, and unless we are overtly pushing back in the other direction we lose credibility.
A similar concept is one I learned as a teenager while photographing Tohono O'Odham people at the San Xavier del Bac mission near Tucson, AZ in the early 1960's. I was told they believe a photograph takes a part of the spirit of an object. That was a heavy concept at the time, but it did make decisions about who or what to photograph very easy. But over 50 years later, all that I photograph are the spirits of objects, rather than the objects...
In this particular case, as is clear from the discussion here, the photograph (at least in the context that exists here) has turned the subject into exactly what Sontag described, an object that is symbolically possessed, in a less than totally respectful way, and hence has been subject to "subliminal murder".
That is acceptable only because the topic here is what makes that happen, and how to manage it. Which of course should strictly be how to avoid the lack of respect being extended to the subject of the photograph.
Unless a photographer is comfortable with it, the solution is don't do it. I've always thought the litmus test was pretty simple: I want a photograph that not only would the subject be happy to give to their father or mother, but that I personally would be proud to present.
Photographs that emphasize circumstances that degrade the subject on a permanent basis just might not be appropriate. The same circumstances, when made to appear joyous or temporary, might be perfect.
Possessing the symbol is one thing, kicking it into the corner is another! This thread has had way too much discussion about that corner, and not enough about how to keep the symbol away from there.