It's not that simple. What is just a hobby for you might be a source of income for someone else. You can't turn tables around and say they can't make money only because you don't expect a payment for your hobby.
I wish there was some way to mark such hostile silo-parts of the web against the allmende, original web.
Before using an image for anything, I always check its license. It's so easy nowadays! Filtering by license is now part of Google Image search, so you don't even have to visit specialized sites like in the old days. Everything someone created is copyrighted and you can't just use it as you want, unless the creator allows you to - and many people do. It's so simple. They should teach these things early at school so we wouldn't have problems like the owner of the website in question.