Personally, I've soured on the idea of being ironic in songs. Most people will miss the irony, they only listen to the catchy chorus, and more often than not, the lines you meant as absurd will be proudly paraded by the same people you were mocking. Take the recent "We the people" by A Tribe Called Quest: the chorus, taken alone, is a bigots' anthem on a catchy tune; I bet it will soon become a mainstay at neonazi rallies and the likes.