If you're creating something that has some sort of cultural currency - if the idea is getting out there - then that will probably yield money in some form, whether it's through selling art or selling books or being asked to give a lecture.
Shepard FaireyThe problem with copyright enforcement is that when the parameters aren't incredibly well defined, it means big corporations, who have deeper pockets and better lawyers, can bully people.
Shepard FaireyCreating is about sharing ideas, sharing aesthetics, sharing what you believe in with other people.
Shepard Fairey