copiers with attitude will return the favor when you slam their front doors, kick them in the gut, stuff their mouths to overflow...
they'll eat your report that's due in 5 minutes, they'll shred your social security card...they'll smear carcinogenics the length of your pretty girlfriend's face...
be nice to mr. copier, be nice to canongirl...be nice to the librarian, who knows how to even things out.