There is a plugin to hide the featured image. I’m using it. However, bulk stuff is your forte. Perhaps you can do it? It is theme specific. So that is why I don’t want to remove the first picture which is usually the featured image. If I change themes.. then I have a lot of work to do. However, if there was a bulk hide.. then this would be great. https://github.com/cyrillbolliger/conditional-featured-image