Girlfriend charges her boyfriend $50 every time he comes home late

This woman's boyfriend likes to party with his friends and that means that at times he is home late.  Rather than get mad and yell at her boyfriend, they've agreed to a $50 fine for every time he comes home late.  Seems like a pretty good system!  Guys, which would you rather have, her getting mad at you for coming home late, or pay a fine?  More here