I don't think any signed permission is required for noncommercial
use of one's own photos, so long as you're not violating some major
privacy issue (which doesn't come into play in public places
anyway).
While you may own the photos, you don't own the likeness of the
people in them. They mst definitely have rights related to the
exhibition of their likeness. While the are certain fair use
exceptions that allow some types of exhibition and even sale of
photos of recognizable people without the need for a release, it's
far too easy to find yourself on the wrong or expensive side of a
lawsuit to make it worthwhile to play fast and loose with a
situation like this. Poor judgment can be costly.
Post all you want. It's your right to freedom of expression.
Sorry, bud, but freedom of expression does not relate to a
situation like this. You can't just use other people's likeness as
you see fit. We are a people governed by the rule of law. Freedom
does not mean free to do as you please. Look it up. There's a few
books available on the subject.
--
Rick A. Diaz
http://www.mcjournalist.com
The image is everything.
My opinions are my own. I paid good money for them.
See my profile for equipment list.