In the US there is NO reasonable expectation of privacy in public. A recent case in New York a photographer took a street photo. That photo was later part of an exhibit. The photographer later published a book in limited quantities which contained that image and others. The photographer did not get a signed release form.
He was sued by a person who appeared in one of the street photos he took. He eventually won his case. Was it worth the effort? If you make a living or intend to make a living from your work then yes.
I have watch several YouTube videos and read several accounts of photographers who are hassled by cops for taking street photos. They'll tell you that you are in violation of Homeland Security laws that protect public buildings and spaces. Blah, blah, blah.
Cops involved in these incidents have been very heavy handed. They'll demand that you to stop taking photos and/or leave, demand that you show and/or give up the film or memory card. The cops do not have the right to confiscate your camera, film or memory card. Its funny they don't have a problem with the Google car taking automated photos of...everything!
After further research I found that if you use a tripod on a sidewalk, street or park you will need an expensive permit.
Here in Houston there is a beautiful water wall. This was a private space owned by the Transco Tower now the Williams Tower. It used to be free for the citizens to use. It is now a City of Houston park and the fees to use a tripod or take wedding photos can be expensive.
I recently bought a Super Ricohflex. I really want to use my tripod so that I can take sharper images. If got to downtown early enough I might be able to take photos without any issues. I'll have to wait since I don't have a permit and I don't want to be hassled by cops. (I wonder if a box of doughnuts might distract them.)
Perhaps I'll get less scrutiny if I just used my Android. (j/k)
