best: greenday (homebake brisbane - 2000 iirc) great set, then poured something flamable onto their guitars, drum kit etc, lit it on fire, trashed their equipment. Needless to say they were escorted off stage by security
worst: blink 182 big day out 2001 - played 2 or 3 songs in an hour set. talked about their penis' until eventually booed off stage (people started pegging shoes, bottles etc at them)