It's a compliment, right?
I'm not cross (well, not very) and part of me is flattered. Since neither of us is making money out of this I don't regard it as any big deal. I just want the person that did it to know I know.
Dude, the convention is to put "borrowed" material in quotation marks and to give the original author credit.
Still, I'm easy. None of the stuff on this blog is copyrighted. And maybe (who knows?) there are other people out there taking credit for what I've done. I'm not a professional writer or photographer. My philosophy with this blog is that I'm putting messages in bottles and casting them out to sea. What happens next is up to wind and wave and ocean current.