This question already has an answer here:
[Removed unnecessary questions and rephrased the question]
I have a few concerns about taking pictures of people for commercial and non-commercial purposes [U.S.].
- Can I post online pictures of people in public places for non-commercial purposes (Flickr, Facebook, etc..)?
I noticed that there are way too many picture on the internet with people in the shot, and I doubt all these photographers asked permission to publish.