I feel that I must apologize for my earlier posts in this thread. I mean no disrepect for the professional photoghraphers here whose excellent work is their livelihood. I fully support their efforts to protect their property rights, and I share their condemnations of the unscrupulous individuals who would profit from theft of their work. The point I was trying (unsuccessfully) to make was that in the case of a web site using photos submitted by members to show off the wonders of the world, not sellng either photos or tourism, I was initially pleased to see one of my images was deemed sufficiently interesting that it was posted. If the site were profiting from my image, I would have been incensed. I would also have submitted a DMCA letter demanding its removal. Given that the image has been available on the internet for at least 15 years, I'm not surprised to see that it has been spread around. It's the first time that I've received any kind of notice that somebody liked my work.
That being said, I'll go back to lurking on the Business forum and continue to learn from what I read here. Thank you, everyone, for your forebearance.