[Allison K]

I've encountered the same thing (in robotics and elsewhere) and it seems to stem from a fear of people taking pictures specifically to find the most embarrassing ones possible to plaster all over the internet. I tell whomever I'm photographing that I promise to respect my subjects by filtering the photos that I take only posting photos that show them in a good light (ie - "If this were me, would I want this photo on the internet"). Once they are comfortable that I will only post pictures that look nice they seem to calm down. Also, I remind them that we need some photographic records to show off to sponsors so that we keep getting funding, parents and schools so that we keep getting support, etc.