I let people in a lot when I drive, but there are a lot of people who don't. Why would they, right? If you truly believe that whether you do the nice thing or the not-so-nice thing, that they're out of your life five seconds later either way, then of course you're going to keep going, avoiding eye contact (I hate that move).
So, how do we increase Letter Inners and decrease Selfish Buttholes?
I propose a game show like Cash Cab, where you could randomly let in another motorist, and sirens, lights, and a bullhorn would start going off on a car, telling you to pull over, and they would hand you a big wad of cash. I think if we knew there was a car like that out there, we might drive a little less selfishly.
What do you think?
Oh, one more idea. How about the cash car would let other people in and would give money out to people who gave a thank you wave?