I read those threads all the time.
It usually goes something like this:
Random Parra fan: "Player X is so shit. I can't believe he's even out there, he's reserve grade quality. BA is an idiot!"
Pou: "Actually if you look at these stats which I will gladly post for you it proves that he's a decent first grader."
Random Parra fan: "Shut up you f**king idiot, you don't know shit!"
Pou: "Well I've given you the stats to prove it, what have you got merkin?"
Random Parra fan: "I've got my eyes and I can see."
Pou: "Wel you're just as stupid as the rest of these idiots then."
Rinse and repeat.
That's an interesting take on it. An alternate one would be:
During game...
Random Parra fans: [make posts and observations as they are watching the game]
Random Parra fans: [sometimes use the thread to vent or praise while they are supporting the team and experiencing the match]
Random Parra fans: [use these forums as conversation about footy, similar to how they would with fellow fans in person, just shooting the breeze not looking for an argument]
Post game...
Pou: [Without specific invitation, dredges up selective stats with the only apparent aim to be be contrary...]
Pou: [Continues ad nauseam - even posting things he doesn't actually believe - in the hope of sparking some argumentative exchanges to pass his time over the coming days...]
Most random Parra fans: [ignore the match day threads from 15mins after the game finishes]
Some random Parra fans: [choose to engage with Pou's posts on occasion, to show them up as the trolling that they are - and just to have a bit of sport with the guy to pass their time]