I work in international development and have struggled for years on how to best respect individuals I work with or visit abroad when I take their picture. The picture might be to put up on my own blog or for an organizations website. I usually use them to tell a story. I decided one way I could go about this in a more positive way is 1) to always take positive pictures and 2) to always ask permission of the people's whose picture I take and 3) to tote along an instax camera. Anyone whose picture I take, I leave behind a picture with them so they also benefit from the interaction as well. Thanks for your insight and bringing this up!