This teaser poster for the upcoming season of Mad Men, which features nothing but a stark white background and the falling ad exec from the opening credits, has been praised by critics as "evocative," "enigmatic," and "intriguing." Unfortunately, it has also been praised by subway vandals as "easy to mess with," "really easy to mess with," and "kind of asking for it, really." And, as you can see from this series of photos, they've had more creative ideas than a brainstorm session at Sterling Cooper Draper Price.