In case you think that it's only amateur or semi-professional photographers that are approached for FREE photographs, or that the people making the approach are only struggling brides/grooms or charitable institutions, you need to read this piece by Strobists' David Hobby on his blog.
http://strobist.blogspot.com.au/2013...like-some.html
Anyone feel like photographers have become the targets of the Borg? "Resistance is futile. We will assimilate you!"