My example of a time in which I violated copyright was maybe knowingly, but I'll blame in on naivete. One of the only times I am aware of breaking copyright laws was as a middle school student. The whole napster/ file share thing was all the rage. I thought it was the greatest thing ever. I got away with it for a few month and then my dad (who is also a tech guru and currently creates and develops both software and apps for various companies) realized what I was doing. As an individual who works so heavily in the field, he quickly squashed that file share website I was using from our computer and let me know come hell or high water, I would not be using a website like that again. As a student I did not realize the repercussions of using file share in that manner, nor that "stealing" music would have negative effects on the artists who created the music. Obviously, this was before the constant video and music piracy advertising campaigns (side bar: I wish there was another term to use rather than piracy- kids like pirates too much, and I feel like the term causes them to disengage in the seriousness of the matter).
Check out my Face of the Classroom site to see the creative commons license at the bottom of the homepage.
As an English teacher, plagiarism checkers are a lifesaver. We, as a building, use Turnitin.com. This website has a number of different features including comparing work from online to work submitted by other students within our database. English students in our building are comfortable and aware of the uses of turnitin and know that we, as a staff, take plagiarism seriously. Often, we have students submit their rough drafts to turnitin so they can see how the software would "grade" and compare their work to other "published" works. This helps students who may not have realized (especially in research writing) how closely their copied the words of the author.