Meanest Piece of Airport Graffiti Ever?

Gotta wonder how many travelers at this unidentified airport have jammed their iPhone charger into a sticker. Reddit user win-ini posted this image yesterday, which has led to almost 1,286 comments, largely about charging gadgets at airports. The post was later edited to say the sticker was a piece of guerrilla marketing. If so, guerrillas 1, travelers 0.