Explain that you were glad to help early on, but you're now being taken advantage of and you want to stop being treated like a copy shop. If they disrespect you, fine, you'll have an even better reason to deny them the use of your printer. Alternately, you could charge 25 cents per page to cover the cost of paper and inks.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.