Dollar bill vandalized with extremely helpful warning.

When you were a kid, your mom always said, "You don't know where that money's been." But this $5 bill removes any sense of mystery from that equation. If this trend catches on, soon we'll see $20 bills that say "This was used by one very sad man to order 20 separate things off the dollar menu"; $100 bills that say "This was in a metallic briefcase that was used to pay off a Mafia hitman"; and $10,000 bills that say "Property of Mitt Romney."