I can certainly appreciate you're not liking to see your picture used by someone else to sell something, but...
lots of times its much more convenient to use a general picture you find online because maybe you dont have a camera, or dont want to go to the trouble right then of taking the shot, downloading it, etc., or your part is mounted and difficult to get a good shot of, or whatever. That said, he should have just said the pictures werent of his actual tracks, but he kinda did when he said his had chrome knobs.
What are the rules or laws which govern use of pictures online, cause I have copied countless pictures just for my own use or reference. I would think unless it's copyrighted, once you post it online somewhere, it then belongs to the world. Just asking.