Murph, you are dead on. Even though it is improper to use another person's photo without permission or credit, it happens all the time. Every year or two a series of train photos makes the rounds of the internet, most of the photos lifted from railpictures.net but cropped to eliminate the copyright at the bottom. Several of my photos are in these and I recognize many of the other photos as well. I even won fourth place in a photo contest that I didn't enter. Someone took a photo from railpictures and entered it in a camera club contest.
A viewer spotted it, recognized where it had come from and sent me an email.
It helps to have a sense of humor.
Michael Allen