Adam Infanticide is a street artist who's work consists mainly of simple handwritten phrases (generally caustic observations or suggestions) on stickers often accompanied by a heart symbol. His work has been seen in New York and northern California for at least several years and has been attributed to "black heart girl," "lover boy" or just "heart." It's unclear where the name "Adam Infanticide" came from as there is little information available. He is named in an SF Weekly article as a graphic designer and as having "invented" SF marching band, the Gomorran Social Aid and Pleasure Club. In interviews, he has named both Yoko Ono and Barbara Kruger as influences.
Photos of his work is featured prominently in graffiti book, Written on the City.