I saw them on the Evisceration Plague tour; great live act, but probably not family friendly enough for the GF.
If it was up to me, I would ban all kids (well under 15 anyway) from getting Grand Final tix, they are too young and snot nosed to appreciate it enough anyway (they can watch it home with grandparents or other rellos) itwould clearly up a few thousand more tickets to dyed in the wool club members to be able to attend the Grand Final..
Mind you i am dead keen on Pussy Riot to perform at the Grand Final too. Prolly not going to happen alas. But it would be amazing