I agree that it's a part of being human, not just a photographer. There's a famous saying that has been attributed to, amongst others, Henry Kissinger, William Sayre, and Samual Johnson. Basically, "Academic politics is the most vicious and bitter form of politics, because the stakes are so low."
People are territorial. Something I remember all too well from grad school was the push to find your own little research niche that had nothing to do with your adviser's research. You do NOT step on toes. If there was the slightest hint that your research could even vaguely put your prof's research into question, then you'd be raked over the coals. All for what? The six people on the committee who would read your research and maybe the 6 others who would read it over the rest of your career?
Who's going to see all these photographs that get lost in the sheer avalanche of online images? A few friends and family, maybe a couple of people from forums or blog followers? Stakes? None. Resulting bitterness? Unlimited.