There is nothing wrong with photos of dead / trapped animals as such, if they are used in the right context. The photos of dead animals with just the words "I had these today" or what ever, serve no other purpose other than to boost the posters ego.
However, a good write up with pictures or end of day shots tells a story, I know what I would rather see. People compare the trapping programs to internet forums, but the images you see on such programs are an integral part of the story, they show how they set the traps the daily trudge checking the traps so in that respect they are not at all