But Chuck, how else to be but emotional if it's your stuff, or it could be your stuff that's getting used without permission?
As for educational use, well, they used to produce actual books when I was in school and pupils got to see art and a lot more through that route; probably why no-one in an art class ever needed what's now referred to as (and has become) obligatory sex education. The stuff used in books wasn't pirated, I would suggest, because whatever was used was there, in print, forever, for any legal action based on the copyright rights extant at the time. Good for the authors and better still for the students.
But today's world is impermanent; values fluctuate as wildly as, apparently, do rights. I still believe that the golden rule should always be: nothing published without written permission unless for very strict reference purposes only. That would cover legitimate reviews of works such as books, plays, movies, music and permit such things as visual references to something or another to be made. The underlying feature, it seems to me, is that no commercial gain be made form the actual work being shown, i.e. no form of copying and subsequent monkeying about to disguise but use, or even blatantly incorporate the original work in some way. Plagiarism is another matter.