You see them (the same type of idiot) at every game sadly. The ones who can afford the jersey, bandwagon as supporters but have no interest in the game, and instead more interest in causing trouble.
There will ALWAYS be hecklers from opposing sides. It's part of the game. But you have three options when you are getting heckled (outside of the game/on way to game).
1. Fire up and mouth back, causing most likely a flare up or conflict from the other supporter.
2. Ignore them and go about your way (the most sensible solution).
3. Inform security/police nearby and let them resolve the issue.
Our club has done a downright brilliant job of turning the image of supporters around.
A short story... a few years ago still when the media were highlighting the Bulldogs as having problem supporters, I didn't attend live games. I feared that those diehard supporters were the ones the media claimed were causing problems and I didn't want to get involved in that. How wrong I was. If anything it's when you get amongst the TRUE supporters that you realise the idiots are minority. I'm so glad that I joined up as a member and got amongst the real fans, because it completely changed my perception on things.
The media is slowly coming around and you notice commentators often highlight supporters and The Kennel/Army on TV these days. Kennel members point out troublemakers where they can because even if you have 20,005 Bulldogs supporters, if you have 5 who start a brawl or trash a train, it won'tbe the other 20,000 good well behaved supporters that hit the newspaper, it'll be the 5 causing problems.
If anyone has mates who are prone to a bit of a brain explosion at the footy, give a clip around the ears and tell them to behave themselves if they start playing up. Their actions reflect negatively on an entire fan base.