On day 26 of his ongoing “Better Out Than In” New York City street exhibition, Banksy went to Sunset Park and delivers an alternative New York bumper slogan, reading “The Grumpier You Are, The More Assholes You Meet.
If you want to know if someone is "real" tell them an obvious lie. A human will recognize it for what it is immediately, a cursed will not. They may look real, but they are not. Only real eyes realize real lies.