"License Plate", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License
The next day: 'What? Six bank robberies!? But I just vandalized the library!' 'Nice try. They saw your plate with all the 1's and I's.' 'That's impossible! I've been with my car the whole ti-- ... wait. Ok, wow, that was clever of her.'