I could care less if a person who stole an image has their business damaged. I would welcome it. The reason I think the lawyers give for not posting or publishing the name of an alleged thief is that they can claim that you are engaging in practices that are interfering with their right to do business. "that's just what I want to do" you may be thinking. True, but unless you can prove in court that they stole the image from you and take them to court and win, I believe they can file civil slander suit against you.
Tell all your friends and colleagues. File with the BBB. But unless you are willing to go to court, do it quietly.
Tell all your friends and colleagues. File with the BBB. But unless you are willing to go to court, do it quietly.