Silverman wrote:
Yes, I agree, I have researched this subject, be careful how you use your people or Private property images, selling them for you personal profit can be a legal nightmare for you, you must get signed permission to use their photos for your profit.
Your research is faulty. In the United States, you may photograph people in public places, and sell that as art work. No permission or releases are required. A third party, however, has no right to the commercial use of that image without a model release of any identifiable person in the photo.