When they pimp Lex's stuff had have them killed off on the sly, and his own special clean up crew would follow him around in secret like a pack of ninjas waiting to clean up yet another body.
Or they find out that the Joker stole the Lex wing, and Lex could pull up in a stretch with blacked out windows or something and be all "da bitch took ma ride". And then they fight epically, with the crew been caught in the crossfire.