Which they'd already been doing for 5 mins post match.
During the medal ceremony is a time to show a bit of respect. This wasn't even a game you nearly won as you never hit the front. It's frustrating to get close, but much tougher when you've been winning and had it snatched away. This game was the Pies all the way, the Bombers just almost stole it, they never owned it.
Most fans accept booing during a game or displeasure at umpiring. Once that's been done and has come to a stop, as it had here, it's poor form and very unusual for it to start up again as a player accepts a medal. I can only remember this happening in a derby when Judd won the medal in a losing effort (wow, back in 2006). Plenty of games with poor umpiring decisions and tough losses, but behaviour like we saw today is very, very rare.