I was riding the car one day with Brian and Noah (to Taco Bell, obviously), and Brian took the pennies he'd received for change and threw them out the window. When asked why, he simply responded that pennies were virtually worthless these days, and it wasn't worth the effort to carry them around. He also added that it wasn't really littering, though, because maybe a small child or a homeless person would find the pennies and want them. After all, there are unfortunates out there who will dig through a garbage can for a dirty beer can that be recycled for a nickel; wouldn't they welcome a free penny?
Noah agreed, and I couldn't really help but kind of concur also. Pennies are useless these days; some places won't even sell you a gumball for a penny anymore, and it definitely takes at least fifty cents to get a good-sized jawbreaker. Pennies are heavy, dirty, and can't really buy anything - all they're good for is the rare instance when your Tbell order costs exactly $4.01 and you can use up a penny making sure you don't receive more pennies as change. Even then, the magnanimous Taco Bell employees will often just let the penny slide.
So some penny solutions we came up with: