How do you know about his blog? Is he vocal about this blog? Is his practicing name attached to it? Is he seeking professional attention for this blog? If one of my therapists were writing a private blog under a pen name, I would be less bothered about her mentioning something I said under the cloak of "my client said something interesting" than if her name and practice was attached to the blog and she wrote something I didn't consent to about me on it.

If the blog is under a pen name, did he give you a link to it or something? It just feels odd that you would be able to access a blog that might be personal if he's discussing potential movie plots on it.

However, even if you throw away how it was connected to him, as an artist, I feel very VERY strongly about things like this. I wrote something long and ranty, comparing it to stealing other musician’s music, but I think it was a little too extreme because it talked about stealing stuff and monetizing off of it. But if his blog had ads on it… then it wouldn’t be. Anyway... so I enjoy taking photos. I hesitate to call myself an amateur photographer because that is too serious for what I do. I just like taking pictures of animals and nature or city views. I took some pictures of my guinea pigs and my younger sister saw them and asked me to send them to her because she liked them. I did. A few months later, I found her deviantart and saw that she posted MY pictures to her profile and credited it to herself. Furious, I waited for her to be not at home, then went on her laptop, on her profile, deleted all of the pictures and posted a message saying "Dear my fans, I stole all of my photos that I posted here from my older sister and they have thus been taken down. I'm sorry that I lied to all of you and you can follow my sister to see all of the removed photos at *inserted my own links*". When she noticed it, she was angry took it down and reuploaded everything but not before getting some upset messages and losing people on her page. But that's how I feel about taking someone else's content even on a less professional level. She reuploaded everything because if she didn't have a problem stealing my work to begin with, then she doesn't have a problem stealing it again. So I would absolutely call him on it and then probably never talk to him again not because I'd be afraid that he'd do it again, but because I know he would. If he had no moral dilemma writing that the first time around, Hell, even on my blog, I don't copy other people's posts or write an idea my friend had and call it mine and my blog is completely private. I don't do that because I hold my own personal artistic ethics over anything else. Everything I put my name on is going to be genuinely my work because I don’t want to be successful by lying and cheating and exploiting others. Anyone who doesn’t think that taking someone else’s ideas is directly exploiting them either for money or notoriety is extremely self-centered, potentially sociopathic or psychopathic, and not anyone I would associate with on a professional or personal level.

But that’s just me. I would call him on it regardless of how you decide to handle seeing him further.