some people live by principles. They would never think of stealing copyrighted material, or dispersing it beyond what the law allows, simply on principle.

The problem is, if they use computers, etc., they are throwing around copyrighted material all the time, accidentally. There is so much copyrighted software out there, that if you make almost any kind of software whatever, you are probably accidentally including some scripting that is already in use in some other copyrighted software.

So here you are, a end user. You wouldn't break copyright, but you can't help it because a whole bunch of the software you are using has broken copyright. It's just that the companies breaking copyright haven't gotten caught in their honest mistake yet.