Ebay seller stole my picture
I actually did that. He offered to send me a magnet. I refused and told him that all I ask was that he took the time to verify where he got his photos before printing.
I worked for a professional photographer for a few years. The laws are clear. If you didn't take the photo, it isn't yours to use. It would be like walking into someone's front yard and stealing their kids toys because they are outside and viewable and saying that is ok... no way. If you want to use an image, just ask. I know for myself, I would be happy to give permission, I just want to have the opportunity to control where they go. I sure don't want my photos showing up on a website that promotes topics and/or values that I disagree with.