The topic of wether or not the church webmaster must obtain permission gets much discussion among church webmasters.

On the topic of photos of adults, this forum post from "thePhotoForum.com," guides it's followers the following advice:

"There are two issues you need to work with here. First is the Model Release and second would be Property Release. For the Model Release I would like to reference Photography People by Roderick Macmillan:

"In most countries, people may be photographed in public places and the images published without obtaining consent. However, if the cooperation of the subjects was obtained, the photographs were shot in a private place, or the images are to be used commercially...it is only reasonable to seek permission before proceeding."

For Property Release I would like to reference The Basic Book Of Photography by Tom Grimm and Michele Grimm.

"Advertisers may also require PROPERTY RELEASES if a building or other identifiable property is prominent in the picture."

Look, if it is a private function get a release. If you are in a park and snapping away without the cooperation of the subject and no private property is in place, you are fine.

The two books I referenced are good, but do not directly deal with legalities so I also recommend getting a book like Wedding And Portrait Photographers' Legal Handbook by Norman Phillips and Christopher S. Nudo, Esq. This book is written for the laws of Illinois, however it is very detailed and provides great legal advice for only $30.

Hope this helps."

See the entire forum entry here