Just watched a clip from 360. Piggy was saying we need to get it out of the game. Derm was saying it is all part of the theatre of footy, as long as it is not racially driven or directed at the marginised. He even apologised for defending the Bombers. His point is that the punters work hard druing the week, then pay their hard-earned to go to the footy. They are entitled to let of a bit of steam.
I'm with Derm. As a kid I would always boo players of the cross-town rivals (truth is their grounds were adjacent), simply because they played for the 'enemy'. Umpires were always fair game, too.
TBH, the AFL has really butchered the games this year. It is more like Big Bash where shit sides get a run on, mainly because everybody is totally stuffed, scores are generally lower, umpires are making bizarre calls week in, week out. St Kilda is currently top 3 FFS. (Perhaps all due to Ratts

).
Not the game I grew up loving. Now they are trying to take away my right to boo. Feck that.