I haven't planted any of my birdhouse planters yet - they were just made this winter - but I'm planning on using only sphagnum moss as a planting medium.
I pinned a bunch of Lynn's copywritted pictures to my Pinterest board, but with Lynn's permission. There are probably others who have pinned them from here too though. But I agree, it doesn't seem to matter if pictures have a copywrite or not, people don't get permission, just pin them. And really, it would be impossible to track every one of them down. I guess that's one of the bad things about the internet - you can't control who gets and does what with it once it's posted somewhere.