I've had people lift some of my patterns from a photo of my finished project. It has happened to me on 2 occasions. I give away a lot of free patterns and information. I specifically didn't share these pattern because it was based on copyrighted material. In my mind, lifting a pattern from a finished project is basically the same thing as taking someone else's pattern without permission. If you really want the pattern, message the person and ask for the pattern if they designed it, or ask where you can buy the pattern yourself. Otherwise, you can always design the pattern yourself, using the photo as inspiration. But when designing your own pattern, make it your own and unique.