[eugenez]

At least in the United States, Personality rights are only for commercial use. You do not need someone's consent to take their photo or to publish said photo as long as you do not attempt to profit from it.

This for example allows you to take a photo on the street and publish it even if the photo contains some strangers. The concern that does come up is whether the subject of the photo has a reasonable expectation of privacy; if they are in public, they do not. (note: not a lawyer, but I have taken many photos of strangers)