<Table> <Tr> <Td> </Td> <Td> "Bad" (1) </Td> <Td> "A Sort of Homecoming" (2) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> "Bad" (1) </Td> <Td> "A Sort of Homecoming" (2) </Td> </Tr> <P> "Bad" is a song by rock band U2 and the seventh track from their 1984 album, The Unforgettable Fire . A song about heroin addiction, it is considered a fan favourite, and is one of U2's most frequently performed songs in concert . </P> <P> A performance of the song at 1985's Live Aid was a career breakthrough for the band . </P>

What is the song bad about by u2