Watermarks are commonly used by photographers these days to protect their work from unauthorized use and distribution. However, they're not very popular among photo viewers, since they do a lot to detract from the content of the photographs.
Here’s a short video by PBS about Duluth, Minnesota-based street photographer Kip Praslowicz.
I love what the Internet has done for the sharing of photography. Social websites such as Flickr make it so easy to get our work in front of the faces of people on the other side of the Earth so easily that it boggles my mind sometimes. This incredible ability of technology has one horrible side effect however. I'm talking about title fields.