By my definition these days a troll is someone who tries to cause pain, embarrassment, discomfort, confusion, fear, loathing....and all from a safe distance invisibly behind a computer keyboard.
In days gone by I think we'd have called them a coward.
Should Pies people call them out or complain about their antics? Yeah I think we should. Again, in days gone by if a bloke was sprouting rubbish and trying to incite us because we were Pies supporters...he'd be sorted out. Not too many people would troll if that friendly punch in the nose still existed (can anyone design an app for that?).
Pies people can debate, we can have opinions, we can shake the MCG when we're in full cry. But there's nothing that says someone should be able to hide behind a veil of impunity and chuck hand grenades just because technology allows them to.
"The only thing necessary for the triumph of evil is for good men to do nothing."
Edmund Burke