I recently decided to continue my education and one of the books I was required to read addressed plagiarism and according to it.....yes, it's called "self-plagiarism". LOL
Do I think the idea of re-using your own work might be a little unethical if your doing it in an educational setting? possibly, but that comes down to personal ethics and values
Do I think it's really plagiarism to use your own work in other ways? Nope...When I first read the "self-plagiarism" in my book I laughed and I still chuckle at the concept of it. It's just my opinion, but the notion is just silly to me.